Function name: GetMessage

Defined in : User32

Requirements : Windows NT 3.1 or later; Windows 95 or later

Declaration:

Declare Function GetMessage Lib "user32" Alias "GetMessageA" (lpMsg As MSG, ByVal hwnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long) As Long

Parameters:

* lpMsg Points to an MSG structure that receives message information from the thread’s message queue. * hWnd Identifies the window whose messages are to be retrieved. One value has a special meaning: NULL GetMessage retrieves messages for any window that belongs to the calling thread and thread messages posted to the calling thread via PostThreadMessage. * wMsgFilterMin Specifies the integer value of the lowest message value to be retrieved. * wMsgFilterMax Specifies the integer value of the highest message value to be retrieved.

Returns:

If the function retrieves a message other than WM_QUIT, the return value is nonzero. If the function retrieves the WM_QUIT message, the return value is zero. If there is an error, the return value is -1. For example, the function fails if hWnd is an invalid window handle.

Related functions:

Examples:

Classic Windows