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Locks the class factory of the specified control so that dynamically created data associated with the control remains in memory.
BOOL AFXAPI AfxOleLockControl( REFCLSID clsid ); BOOL AFXAPI AfxOleLockControl( LPCTSTR lpszProgID );
This can significantly speed up display of the controls. For example, once you create a control in a dialog box and lock the control with AfxOleLockControl, you do not need to create and kill it again every time the dialog is shown or destroyed. If the user opens and closes a dialog box repeatedly, locking your controls can significantly enhance performance. When you are ready to destroy the control, call AfxOleUnlockControl.