基于对话框程序菜单变灰问题

在基于对话框的程序中，仅仅使用pCmdUI->Enable(FALSE)，只能使其不可用，但是没法将其变灰，解决步骤如下：

1.在放置菜单的那个类的头文件中，声明

afx void OnInitMenuPopup(CMenu* pPopupMenu, UINT nIndex, BOOL bSysMenu);

2.在响应的cpp文件中增加消息映射:

ON_WM_INITMENUPOPUP()

添加定义

void CTcswDlg::OnInitMenuPopup(CMenu *pPopupMenu, UINT nIndex, BOOL bSysMenu){if (!bSysMenu) { ASSERT(pPopupMenu != NULL); // check the enabled state of various menu items CCmdUI state; state.m_pMenu = pPopupMenu; ASSERT(state.m_pOther == NULL); state.m_nIndexMax = pPopupMenu->GetMenuItemCount(); for (state.m_nIndex = 0; state.m_nIndex < state.m_nIndexMax; state.m_nIndex++) { state.m_nID = pPopupMenu->GetMenuItemID(state.m_nIndex); if (state.m_nID == 0) continue; // menu separator or invalid cmd - ignore it ASSERT(state.m_pOther == NULL); ASSERT(state.m_pMenu != NULL); if (state.m_nID == (UINT)-1) { // possibly a popup menu, route to first item of that popup state.m_pSubMenu = pPopupMenu->GetSubMenu(state.m_nIndex); if (state.m_pSubMenu == NULL || (state.m_nID = state.m_pSubMenu->GetMenuItemID(0)) == 0 || state.m_nID == (UINT)-1) { continue; // first item of popup can't be routed to } state.DoUpdate(this, FALSE); // popups are never auto disabled } else { // normal menu item // Auto enable/disable if command is _not_ a system command state.m_pSubMenu = NULL; state.DoUpdate(this, state.m_nID < 0xF000); } } }}

注意：一定要是放置菜单的那个类，而不是响应菜单的类