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PostThreadMessage

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This function places a message in the message queue of the specified thread and then returns without waiting for the thread to process the message.

BOOL PostThreadMessage(
  DWORD idThread, 
  UINT Msg, 
  WPARAM wParam, 
  LPARAM lParam 
);

Parameters

  • idThread
    [in] Identifier of the thread to which the message will be posted.
  • Msg
    [in] Specifies the type of message to be posted.
  • wParam
    [in] Specifies additional message-specific information.
  • lParam
    [in] Specifies additional message-specific information.

Return Values

Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError. GetLastError returns ERROR_INVALID_THREAD_ID if idThread is not a valid thread identifier.

Remarks

The thread to which the message is posted retrieves the message by calling the GetMessage or PeekMessage function. The hwnd member of the returned MSG structure is NULL.

Requirements

OS Versions: Windows CE 1.0 and later.
Header: Winuser.h.
Link Library: Coredll.lib.

See Also

Message Queue Functions | GetCurrentThreadId | GetMessage | MSG | PeekMessage | PostMessage

Last updated on Wednesday, April 13, 2005

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