The chHANDLE_DLGMSG Macro

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When you use message crackers with dialog boxes, you should not use the HANDLE_MSG macro from Microsoft's WindowsX.h header file because it doesn't return TRUE or FALSE to indicate whether a message was handled by the dialog box procedure. My chHANDLE_DLGMSG macro massages the window message's return value and handles it properly for use in a dialog box procedure.