Sent to a window that the user is moving. By processing this message, an application can monitor the position of the drag rectangle and, if needed, change its position.
A window receives this message through its WindowProc function.
This parameter is not used.
A pointer to a RECT structure with the current position of the window, in screen coordinates. To change the position of the drag rectangle, an application must change the members of this structure.
An application should return TRUE if it processes this message.
Minimum supported client
|Windows 2000 Professional [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|
Build date: 2/25/2013