windows一些数据类型解释

来自MSDN

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.

然而，在实际情况中，DWORD会根据操作系统的不同，被定义成了不同的长度，比如vs8(xp)中，DWORD被定义成了如下的类型：

typedef unsigned long DWORD; 而unsigned long 的长度则是8个字节即64位，如果是在64位的操作系统中，这个长度可能会更长，这需要取决于当前操作系统以及开发环境等有关方面，具体可以参考相关的帮助说明！