ULONG_PTR 和ULONG

ULONG

Unsigned LONG. The range is 0 through 4294967295 decimal.

This type is declared in WinDef.h as follows:

typedef unsigned long ULONG;

 

在VS2010中使用ULONG时，需加上头文件#include<WinDef.h>,否则出现inllisense:未定义的标识符ULONG错误

 

ULONG_PTR

Unsigned LONG_PTR.

Unsigned long type for pointer precision. Use when casting a pointer to a long type to perform pointer arithmetic. (Also commonly used for general 32-bit parameters that have been extended to 64 bits in 64-bit Windows.)

This type is declared in BaseTsd.h as follows:

typedef ULONG_PTR DWORD_PTR;