Data Types in VC

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.