Sent when the user drops a file on the window of an application that has registered itself as a recipient of dropped files.
PostMessage( (HWND) hWndControl, // handle to destination control (UINT) WM_DROPFILES, // message ID (WPARAM) wParam, // = (WPARAM) (HDROP) hDrop; (LPARAM) lParam // = 0; not used, must be zero );
Must be zero.
An application should return zero if it processes this message.
The HDROP handle is declared in Shellapi.h. You must include this header in your build to use WM_DROPFILES. For further discussion of how to use drag-and-drop to transfer Shell data, see Transferring Shell Data Using Drag-and-Drop or the Clipboard.
Minimum supported client
|Windows XP [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|