help,关于改变菜单状态的问题,来看一下

[laserman]

一个程序，需要改变菜单的状态
1。顶层菜单有两种，pop-up和非pop-up的，pop-up的没有ID,非pop-up的有ID。
2。按下一个按钮时，要求所有的顶层菜单为灰色，不可用。我是用EnableMenuItem函数做的，但没有ID的菜单项不知如何解决。
3。按下另外一个按钮，要求菜单变回原来状态。
4。如何更新顶层菜单项？我在编程时无法更新菜单项，只有当鼠标移动到菜单上时，菜单状态才会更新。
那位大侠帮帮忙，谢谢

[freelybird]

void CMainFrame::OnChangeFileMenu()
{
// Get the menu from the application window.
CMenu* mmenu = GetMenu();

// Look for "File" menu.
int pos = FindMenuItem(mmenu, "&File");
if (pos == -1)
return;

// Remove "New" menu item from the File menu.
CMenu* submenu = mmenu->GetSubMenu(pos);
pos = FindMenuItem(submenu, "&New\tCtrl+N");
if (pos > -1)
submenu->RemoveMenu(pos, MF_BYPOSITION);

// Look for "Open" menu item from the File menu. Insert a new
// menu item called "Close" right after the "Open" menu item.
// ID_CLOSEFILE is the command id for the "Close" menu item.
pos = FindMenuItem(submenu, "&Open...\tCtrl+O");
if (pos > -1)
submenu->InsertMenu(pos + 1, MF_BYPOSITION, ID_CLOSEFILE, "&Close");

// Rename menu item "Save" to "Save Selection".
pos = FindMenuItem(submenu, "&Save\tCtrl+S");
if (pos > -1)
{
UINT id = submenu->GetMenuItemID(pos);
submenu->ModifyMenu(id, MF_BYCOMMAND, id, "&Save Selection");
}

// Associate a context help ID with File menu, if one is not found.
// ID_FILE_CONTEXT_HELPID is the context help ID for the File menu
// that is defined in resource file.
if (submenu->GetMenuContextHelpId() == 0)
submenu->SetMenuContextHelpId(ID_FILE_CONTEXT_HELPID);

// Set "Open" menu item as the default menu item for the File menu,
// if one is not found. So, when a user double-clicks the File
// menu, the system sends a command message to the menu's owner
// window and closes the menu as if the File\Open command item had
// been chosen.
if (submenu->GetDefaultItem(GMDI_GOINTOPOPUPS, TRUE) == -1)
{
pos = FindMenuItem(submenu, "&Open...\tCtrl+O");
submenu->SetDefaultItem(pos, TRUE);
}
}

[wealth]

MSDN中的First CD中Sample的VC的MFC中就有，自己找一下就行了，如果嫌一个一个找麻烦的话，全部拷过来再逐个运行就可以找到答案啦。

[freelybird]

CMenu::ModifyMenu(...)

[freelybird]

CMenu::ModifyMenu(...)

[freelybird]

CMenu::ModifyMenu(...)

[laserman]

搞定了，带pop-up属性的不能用ModifyMenu(...)，会被删除
菜单更新用DrawMenuBar()