如何在vc ++中禁用和启用菜单项 [英] how to disable and enable menu items in vc++

问题描述

我在mainframe.cpp&在正常的代码但它崩溃

i did following in mainframe.cpp & in normal code but it is crashing

CMenu *mmenu = GetMenu();
mmenu->EnableMenuItem(IDRMENUNAME,MF_BYPOSITION | MF_DISABLED | MF_GRAYED);

推荐答案

您正在使用菜单项ID IDRMENUNAME MF_BYPOSITION 这可能意味着索引超出范围。您也无法检查 GetMenu 是否返回有效指针。

You are using the menu item id IDRMENUNAME with MF_BYPOSITION which probably means that the index is out of range. You also fail to check that GetMenu returns a valid pointer.

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