Commonly used Windows SDK and MFC data types are as follows:
BOOL?? A Boolean value.
BSTR?? A 32-bit character pointer.
BYTE?? An 8-bit integer that is not signed.
COLORREF?? A 32-bit value used as a color value.
DWORD?? A 32-bit unsigned integer or the address of a segment and its associated offset.
LONG?? A 32-bit signed integer.
LPARAM?? A 32-bit value passed as a parameter to a window procedure or callback function.
LPCSTR?? A 32-bit pointer to a constant character string.
LPSTR?? A 32-bit pointer to a character string.
LPCTSTR?? A 32-bit pointer to a constant character string that is portable for Unicode and DBCS.
LPTSTR?? A 32-bit pointer to a character string that is portable for Unicode and DBCS.
LPVOID?? A 32-bit pointer to an unspecified type.
LRESULT?? A 32-bit value returned from a window procedure or callback function.
UINT?? A 16-bit unsigned integer on Windows versions 3.0 and 3.1; a 32-bit unsigned integer on Win32.
WNDPROC?? A 32-bit pointer to a window procedure.
WORD?? A 16-bit unsigned integer.
WPARAM?? A value passed as a parameter to a window procedure or callback function: 16 bits on Windows versions 3.0 and 3.1; 32 bits on Win32.
Data types unique to the Microsoft Foundation Class Library include the following:
POSITION?? A value used to denote the position of an element in a collection; used by MFC collection classes.
LPCRECT?? A 32-bit pointer to a constant (nonmodifiable) RECT structure.
