= Parameters Long: 'N' or 'L' Integer: 'I' Pointer: 'P' Void: 'V' = Windows Data Types BOOL => 'I' DWORD => 'L' HANDLE => 'L' LPDWORD => 'P' LPTSTR => 'P' UINT => 'I' VOID => 'V' WORD => 'I' = C Data Types void => 'V' void* => 'P' char* => 'P' const char* => 'L' int => 'I' long => 'L' struct => 'P' struct* => 'P'