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Commit ade099f

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Adam Gates
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Added DragDrop
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‎DragDrop.cpp

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// See http://blogs.msdn.com/b/oldnewthing/archive/tags/what+a+drag/
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#include <windows.h>
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#include <stdio.h>
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#include <tchar.h>
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#include <vector>
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#include <string>
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#include <Shlobj.h>
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#include <Shlwapi.h>
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// From http://blogs.msdn.com/b/oldnewthing/archive/2004/09/20/231739.aspx
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HRESULT GetUIObjectOfFile(HWND hwnd, LPCWSTR pszPath, REFIID riid, void **ppv)
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{
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*ppv = NULL;
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HRESULT hr;
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LPITEMIDLIST pidl;
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SFGAOF sfgao;
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if (SUCCEEDED(hr = SHParseDisplayName(pszPath, NULL, &pidl, 0, &sfgao))) {
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IShellFolder *psf;
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LPCITEMIDLIST pidlChild;
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if (SUCCEEDED(hr = SHBindToParent(pidl, IID_IShellFolder,
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(void**)&psf, &pidlChild))) {
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hr = psf->GetUIObjectOf(hwnd, 1, &pidlChild, riid, NULL, ppv);
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psf->Release();
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}
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CoTaskMemFree(pidl);
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}
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return hr;
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}
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// ====
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struct sFindWindowWildcard
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{
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const _TCHAR* lpClassName;
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const _TCHAR* lpWindowName;
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HWND hwnd;
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};
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BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam)
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{
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if (hwnd != GetConsoleWindow())
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{
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sFindWindowWildcard* fww = (sFindWindowWildcard*) lParam;
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TCHAR name[1024];
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TCHAR wndclass[1024];
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GetWindowText(hwnd, name, 1024);
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GetClassName(hwnd, wndclass, 1024);
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if ((fww->lpClassName == NULL || PathMatchSpec(wndclass, fww->lpClassName))
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&& (fww->lpWindowName == NULL || PathMatchSpec(name, fww->lpWindowName)))
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{
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fww->hwnd = hwnd;
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return FALSE;
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}
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else
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return TRUE;
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}
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else
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return TRUE;
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}
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HWND FindWindowWildcard(const _TCHAR* lpClassName, const _TCHAR* lpWindowName)
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{
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//return FindWindow(lpClassName, lpWindowName);
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sFindWindowWildcard fww;
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fww.lpClassName = lpClassName;
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fww.lpWindowName = lpWindowName;
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fww.hwnd = NULL;
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if (lpClassName != NULL || lpWindowName != NULL)
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EnumWindows(EnumWindowsProc, (LPARAM) &fww);
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return fww.hwnd;
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}
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void DoDragDrop(IDropTarget *pdt, const std::vector<std::wstring>& files)
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{
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IDataObject *pdtobj = NULL;
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for (std::vector<std::wstring>::const_iterator it = files.begin(); it != files.end(); ++it)
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{
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// TODO Dropping one at a time. Should lookup how drop all as one.
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if (SUCCEEDED(GetUIObjectOfFile(NULL, it->c_str(), IID_IDataObject, (void**)&pdtobj))) {
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POINTL pt = { 0, 0 };
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DWORD dwEffect = DROPEFFECT_COPY | DROPEFFECT_LINK;
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if (SUCCEEDED(pdt->DragEnter(pdtobj, MK_LBUTTON, pt, &dwEffect))) {
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dwEffect &= DROPEFFECT_COPY | DROPEFFECT_LINK;
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if (dwEffect) {
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pdt->Drop(pdtobj, MK_LBUTTON, pt, &dwEffect);
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} else {
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pdt->DragLeave();
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}
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}
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pdtobj->Release();
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}
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}
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}
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void DoDragDrop(HWND hWndDest, const std::vector<std::wstring>& files)
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{
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size_t size = sizeof(DROPFILES) + sizeof(_TCHAR);
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for (std::vector<std::wstring>::const_iterator it = files.begin(); it != files.end(); ++it)
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{
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size += (it->length() + 1) * sizeof(_TCHAR);
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}
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HGLOBAL hGlobal = GlobalAlloc(GHND, size);
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DROPFILES * df = static_cast<DROPFILES *>(GlobalLock(hGlobal));
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df->pFiles = sizeof(DROPFILES);
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_TCHAR* f = reinterpret_cast<_TCHAR *>(df + 1);
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size -= sizeof(DROPFILES) + sizeof(_TCHAR);
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for (std::vector<std::wstring>::const_iterator it = files.begin(); it != files.end(); ++it)
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{
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_tcscpy_s(f, it->length() + 1, it->c_str());
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size -= (it->length() + 1) * sizeof(_TCHAR);
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f += it->length() + 1;
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}
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df->fNC = TRUE;
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df->fWide = TRUE;
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GlobalUnlock(hGlobal);
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PostMessage(hWndDest, WM_DROPFILES, (WPARAM) hGlobal, 0);
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GlobalFree(hGlobal);
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}
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int _tmain(int argc, _TCHAR* argv[])
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{
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/*HRESULT hr =*/ CoInitialize(0);
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const _TCHAR* lpClassName = NULL;
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const _TCHAR* lpWindowName = NULL;
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std::vector<std::wstring> files;
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//lpClassName = _T("ATL:006AD5B8");
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//files.push_back(_T("C:\\Windows\\ODBC.INI"));
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for (int i = 1; i < argc; ++i)
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{
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const TCHAR* arg = argv[i];
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if (_tcsncmp(arg, _T("/class:"), 7) == 0)
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{
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lpClassName = arg + 7;
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}
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else if (_tcsncmp(arg, _T("/window:"), 8) == 0)
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{
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lpWindowName = arg + 8;
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}
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else
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{
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WIN32_FIND_DATA FindFileData;
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HANDLE hFind = FindFirstFile(arg, &FindFileData);
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if (hFind != INVALID_HANDLE_VALUE)
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{
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do
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{
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TCHAR buffer[4096];
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if (GetFullPathName(FindFileData.cFileName, 4096, buffer, NULL) != 0)
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{
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files.push_back(buffer);
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}
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} while (FindNextFile(hFind, &FindFileData));
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FindClose(hFind);
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}
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}
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}
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if (files.empty())
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{
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_tprintf(_T("Usage:\n"));
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_tprintf(_T("\tDragDrop [/class:<class name>] [/window:<window name>] <files>\n"));
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}
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else
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{
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HWND hWndDest = FindWindowWildcard(lpClassName, lpWindowName);
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if (hWndDest != NULL)
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{
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LONG ExStyle = GetWindowLong(hWndDest, GWL_EXSTYLE);
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IDropTarget *pdt = (IDropTarget *) GetProp(hWndDest, _T("OleDropTargetInterface"));
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//if (SUCCEEDED(GetUIObjectOfFile(hwnd, _T("C:\\Windows\\notepad.exe"), IID_IDropTarget, (void**)&pdt))) {
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if (pdt != NULL)
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{
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DoDragDrop(pdt, files);
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}
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else if ((ExStyle & WS_EX_ACCEPTFILES) == WS_EX_ACCEPTFILES)
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{
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DoDragDrop(hWndDest, files);
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}
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else
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{
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_tprintf(_T("Window 0x%x doesnt support drag and drop.\n"), HandleToUlong(hWndDest));
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}
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}
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else
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{
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_tprintf(_T("Could not find window with class %s and name %s.\n"), lpClassName, lpWindowName);
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}
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}
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CoUninitialize();
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return 0;
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}

‎DragDrop.props

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<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<ItemDefinitionGroup>
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<Link>
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<AdditionalDependencies>user32.lib;ole32.lib;shell32.lib;shlwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
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</Link>
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</ItemDefinitionGroup>
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</Project>

‎README.md

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## [whoami](whoami.c)
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Outputs the name of the current user
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## [DragDrop](DragDrop.cpp)
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Simulates drag and dropping a file onto a window

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