Question

VC++6.0中如何使菜单处于不可用状态(显示为灰色状态)

1.程序是基于对话框的
2.怎么使菜单处于灰色(状态).
3.之后根据条件使其变为可用状态

Answer 1

用EnableMenuItem,自己去msdn里面查下资料,以下是msdn里面的实例:

Example
// The code fragment below shows how to disable (and gray out) the
// File\New menu item.
// NOTE: m_bAutoMenuEnable is set to FALSE in the constructor of
// CMainFrame so no ON_UPDATE_COMMAND_UI or ON_COMMAND handlers are
// needed, and CMenu::EnableMenuItem() will work as expected.

CMenu* mmenu = GetMenu();
CMenu* submenu = mmenu->GetSubMenu(0);
submenu->EnableMenuItem(ID_FILE_NEW, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);