DrawMenuBar

如果系統創建窗口以後菜單條被修改，則必須調用此函數來畫修改了的菜單條。

函數原型：BOOL DrawMenuBar（HWND hWnd）；

參數：

hWnd：其菜單條需要被重畫的窗口的句柄。

返回值：如果函數調用成功，返回非零值：如果函數調用失敗，返回值是零。若想獲得更多的錯誤信息，請調用GetLastError函數。

速查：Windows NT：及以上版本；Windows：95及以上版本；Windows：2.0及以上版本;頭文件：winuser.h；輸入庫：user32.lib。

示例：

void CMainFrame::OnCwndDeletefilemenu()

{

// This example deletes the leftmost popup menu or leftmost

// popup menu item from the application's main window.

CWnd* pMain = AfxGetMainWnd();

// The main window _can_ be NULL, so this code

// doesn't ASSERT and actually tests.

if (pMain != NULL)

{

// Get the main window's menu

CMenu* pMenu = pMain->GetMenu();

// If there is a menu and it has items, we'll

// delete the first one.

if (pMenu != NULL && pMenu->GetMenuItemCount() > 0)

{

pMenu->DeleteMenu(0, MF_BYPOSITION);

// force a redraw of the menu bar

pMain->DrawMenuBar();

}

// No need to delete pMenu because it is an MFC

// temporary object.

}

}