CWinThread::IsIdleMessage
Override this function to keep OnIdle from being called after specific messages are generated.
virtual BOOL IsIdleMessage(
MSG* pMsg
);
Parameters
- pMsg
Points to the current message being processed.
Return Value
Nonzero if OnIdle should be called after processing message; otherwise 0.
Remarks
The default implementation does not call OnIdle after redundant mouse messages and messages generated by blinking carets.
If an application has created a short timer, OnIdle will be called frequently, causing performance problems. To improve such an application's performance, override IsIdleMessage in the application's CWinApp-derived class to check for WM_TIMER messages as follows:
BOOL CMyWinApp::IsIdleMessage(MSG* pMsg)
{
if (!CWinApp::IsIdleMessage(pMsg) || pMsg->message == WM_TIMER)
return FALSE;
else
return TRUE;
}
Handling WM_TIMER in this fashion will improve performance of applications that use short timers.
Requirements
Header: afxwin.h