Basic Windows Data Types (Part 1)

Data types used by Windows	Corresponding Basic Data Type	Description
Bool	Bool	Boolean Value
BSTR	Unsigned short *	32-bit character pointer
Byte	Unsigned char	8-bit unsigned integer
Colorref	Unsigned long	Used as a 32-bit color value
DWORD	Unsigned long	32-bit unsigned integer, segment address and related offset
Long	Long	32-bit signed integer
Lparam	Long	The 32-bit value passed as a parameter to the window process or callback function.
Lpcstr	Const char *	32-bit pointer to a String constant
Lpstr	Char *	32-bit pointer to a string
Lpvoid	Void *	Point to a 32-bit pointer of undefined type
Lresult	Long	32-bit return values from window procedures or callback Functions
Uint	Unsigned int	32-bit unsigned integer
Word	Unsigned short	16-bit unsigned integer
Wparam	Unsigned int	The 32-bit value passed to the window process or callback function as a parameter.

Note:

1. These data types are represented by uppercase letters, which are different from the general C ++ basic data types.

2. If the data type prefix is P or lp, it indicates that the data type is a pointer or long pointer. If the prefix is u, the data type is unsigned, and so on.

3. Windows also provides some macros to process the above basic data types. For example, lobyte and hibyte are used to obtain the low-byte and high-byte values in 16-bit values, and loword and hiword are respectively used to obtain the low-byte and high-byte values in 32-bit values; makeword combines two 16 unsigned values into a 32-bit unsigned value.