Qt如何設置隱藏QDialog的關閉按鈕和標題欄

首先在妳的窗體類中引入壹些Windows API需要的定義

const uint SC_CLOSE = 0xf060;

const uint MF_GRAYED = 0x01;

const uint MF_BYCOMMAND = 0x0;

[DllImport("user32.dll")]

static extern bool EnableMenuItem(IntPtr hMenu, uint uIDEnableItem,

uint uEnable);

[DllImport("user32.dll")]

static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);

[DllImport("user32.dll")]

static extern bool RemoveMenu(IntPtr hMenu, uint uPosition, uint uFlags);

然後可以在窗體的Load事件中加入下列初始化代碼

IntPtr hSysMenu;

hSysMenu = GetSystemMenu(this.Handle, false);

EnableMenuItem(hSysMenu, SC_CLOSE, MF_GRAYED);

RemoveMenu(hSysMenu, SC_CLOSE, MF_BYCOMMAND);