函式原型：HWND GetDesktopWindow（VOID）

参数：无。

返回值：函式返回桌面视窗的句柄。

速查：Windows NT：3.1以上版本；Windows：95以上版本：；头档案：Winuser.h；库档案：user32.lib。

vb

Public Declare Function GetDesktopWindow Lib "user32" Alias "GetDesktopWindow" () As Long

vb_net

Public Declare Function GetDesktopWindow Lib "user32" Alias "GetDesktopWindow" () As Integer

S

【说明】
获得代表整个萤幕的一个视窗（桌面视窗）句柄

【返回值】
Long，桌面视窗的句柄

C#

[DllImport("user32", EntryPoint="GetDesktopWindow")]
public static extern IntPtrGetDesktopWindow ();

返回值是IntPtr 是桌面句柄

{

RECT rectDesktop;

WINDOWPLACEMENT wpNew;

if (!IsFullScreen())

{

// We'll need these to restore the original state.

GetWindowPlacement (&m_wpPrev);

//Adjust RECT to new size of window

::GetWindowRect ( ::GetDesktopWindow(), &rectDesktop );

::AdjustWindowRectEx(&rectDesktop, GetStyle(), FALSE, GetExStyle());

// Remember this for OnGetMinMaxInfo()

m_rcFullScreenRect = rectDesktop;

wpNew = m_wpPrev;

wpNew.showCmd = SW_SHOWNORMAL;

wpNew.rcNormalPosition = rectDesktop;

m_bFullScreen=true;

}

else

{

// 退出全萤幕幕时恢复到原来的视窗状态

m_bFullScreen=false;null

wpNew = m_wpPrev;

}

SetWindowPlacement ( &wpNew );

}

void CFullScreenDlg::OnGetMinMaxInfo(MINMAXINFO* lpMMI)

{

// TODO: Add your message handler code here and/or call default

if (IsFullScreen())

{

lpMMI->ptMaxSize.y = m_rcFullScreenRect.Height();

lpMMI->ptMaxTrackSize.y = lpMMI->ptMaxSize.y;

lpMMI->ptMaxSize.x = m_rcFullScreenRect.Width();

lpMMI->ptMaxTrackSize.x = lpMMI->ptMaxSize.x;

}

CDialog::OnGetMinMaxInfo(lpMMI);

}

bool CFullScreenDlg::IsFullScreen(void)

{

// 记录视窗当前是否处于全萤幕状态

return m_bFullScreen;

}