HWND API：如何調用的ShowWindow（...）時，禁用窗口動畫

Question

我想知道如何調用HWND的ShowWindow（）方法時，抑制動畫。這是我的代碼：

[DllImport("user32.dll")] 
[return: MarshalAs(UnmanagedType.Bool)] 
static extern bool ShowWindow(IntPtr hWnd, ShowWindowCommands nCmdShow); 

public enum ShowWindowCommands 
{ 
    HIDE = 0, 
    SHOWNORMAL = 1, 
    SHOWMINIMIZED = 2, 
    MAXIMIZE = 3, 
    SHOWNOACTIVATE = 4, 
    SHOW = 5, 
    MINIMIZE = 6, 
    SHOWMINNOACTIVE = 7, 
    SHOWNA = 8, 
    RESTORE = 9, 
    SHOWDEFAULT = 10, 
    FORCEMINIMIZE = 11 
} 

public static void MinimizeWindow(IntPtr hWnd) 
{ 
    ShowWindow(hWnd, ShowWindowCommands.MINIMIZE); 
} 

問題是，動畫執行，並且該方法不會返回，直到動畫完成。

我嘗試使用DwmSetWindowAttribute()方法：

[DllImport("dwmapi.dll", PreserveSig = true)] 
static extern int DwmSetWindowAttribute(IntPtr hWnd, uint attr, ref int attrValue, int size); 

const uint DWM_TransitionsForceDisabled = 3; 

public static void SetEnabled(IntPtr hWnd, bool enabled) 
{ 
    int attrVal = enabled ? 0 : 1; 
    DwmSetWindowAttribute(hWnd, DWM_TransitionsForceDisabled, ref attrVal, 4); 
} 

但動畫並沒有抑制。 我的操作系統是Windows 7,32位。

Answer 1

不是最好的選擇，但你可以嘗試調用SystemParametersInfo()指定SPI_GETANIMATION以獲取窗口動畫的當前設置，如果啓用，則使用SPI_SETANIMATION顯示窗口前禁用它們，然後恢復以前的設置。例如：

[StructLayout(LayoutKind.Sequential)] 
public struct ANIMATIONINFO 
{ 
    uint cbSize; 
    int iMinAnimate; 
} 

[DllImport("User32.dll", SetLastError=true)] 
static extern bool SystemParametersInfo(uint uiAction, uint uiParam, ref ANIMATIONINFO pvParam, uint fWinIni); 

const uint SPI_GETANIMATION = 72; 
const uint SPI_SETANIMATION = 73; 

public static void MinimizeWindow(IntPtr hWnd) 
{ 
    ANIMATIONINFO anim; 
    anim.cbSize = Marshal.SizeOf(anim); 
    anim.iMinAnimate = 0; 
    SystemParametersInfo(SPI_GETANIMATION, 0, anim, 0); 

    if (anim.iMinAnimate != 0) 
    { 
     anim.iMinAnimate = 0; 
     SystemParametersInfo(SPI_SETANIMATION, 0, anim, 0); 

     ShowWindow(hWnd, ShowWindowCommands.MINIMIZE); 

     anim.iMinAnimate = 1; 
     SystemParametersInfo(SPI_SETANIMATION, 0, anim, 0); 
    } 
    else 
     ShowWindow(hWnd, ShowWindowCommands.MINIMIZE); 
}