Date: 2009sep29 Language: C/C++ Platform: win32 Q. Is there a Windows message my control can receive to intialize? WM_CREATE, WM_INITDIALOG and others don't do what I want. A. Yes, use WM_UPDATEUISTATE (but only in Windows 2000 and later) Here's how to do it with MFC: --- In the .h file:

//{{AFX_MSG(CMyControl) afx_msg LRESULT OnUpdateUIState(WPARAM, LPARAM); //}}AFX_MSG

--- In the .cpp file:

#ifndef WM_UPDATEUISTATE #define WM_UPDATEUISTATE (0x128) // Message that is sent when InitDialog() has been done. #endif BEGIN_MESSAGE_MAP(CMyControl, CMyBaseClass) //{{AFX_MSG_MAP(CMyControl) ON_MESSAGE(WM_UPDATEUISTATE, OnUpdateUIState) //}}AFX_MSG_MAP END_MESSAGE_MAP() LRESULT CMyControl::OnUpdateUIState(WPARAM, LPARAM) { // (Initialize everything) return 0; }