defined in winuser.h/* * NOTE: All Message Numbers below 0x0400 are RESERVED. * * Private Window Messages Start Here: */ #define WM_USER 0x0400
在你定义的宏上要加括号。 应该这样: #define MENU (WM_USER+6000)按照你原来的定义,宏展开后就成了int OnID=nID-WM_USER+6000; 按照新的定义,宏展开为:int OnID=nID-(WM_USER+6000); 所以会出问题,就这样。
The WM_USER constant is used by applications to help define private messages, usually of the form WM_USER+X, where X is an integer value. #define WM_USER 0x0400
* NOTE: All Message Numbers below 0x0400 are RESERVED.
*
* Private Window Messages Start Here:
*/
#define WM_USER 0x0400
应该这样:
#define MENU (WM_USER+6000)按照你原来的定义,宏展开后就成了int OnID=nID-WM_USER+6000;
按照新的定义,宏展开为:int OnID=nID-(WM_USER+6000);
所以会出问题,就这样。