/// <summary>
/// associate the current thread to the default desktop
/// </summary>
/// <returns></returns>
internal bool BeginInteraction()
{
EndInteraction();
m_hCurWinsta = User32DLL.GetProcessWindowStation();
if (m_hCurWinsta == IntPtr.Zero)
{
return(false);
}
m_hCurDesktop = User32DLL.GetDesktopWindow();
if (m_hCurDesktop == IntPtr.Zero)
{
return(false);
}
m_hWinsta = User32DLL.OpenWindowStation("winsta0", false,
WindowStationAccessRight.WINSTA_ACCESSCLIPBOARD |
WindowStationAccessRight.WINSTA_ACCESSGLOBALATOMS |
WindowStationAccessRight.WINSTA_CREATEDESKTOP |
WindowStationAccessRight.WINSTA_ENUMDESKTOPS |
WindowStationAccessRight.WINSTA_ENUMERATE |
WindowStationAccessRight.WINSTA_EXITWINDOWS |
WindowStationAccessRight.WINSTA_READATTRIBUTES |
WindowStationAccessRight.WINSTA_READSCREEN |
WindowStationAccessRight.WINSTA_WRITEATTRIBUTES
);
if (m_hWinsta == IntPtr.Zero)
{
return(false);
}
User32DLL.SetProcessWindowStation(m_hWinsta);
m_hDesk = User32DLL.OpenDesktop("default", OpenDesktopFlag.DF_NONE, false,
DesktopAccessRight.DESKTOP_CREATEMENU |
DesktopAccessRight.DESKTOP_CREATEWINDOW |
DesktopAccessRight.DESKTOP_ENUMERATE |
DesktopAccessRight.DESKTOP_HOOKCONTROL |
DesktopAccessRight.DESKTOP_JOURNALPLAYBACK |
DesktopAccessRight.DESKTOP_JOURNALRECORD |
DesktopAccessRight.DESKTOP_READOBJECTS |
DesktopAccessRight.DESKTOP_SWITCHDESKTOP |
DesktopAccessRight.DESKTOP_WRITEOBJECTS
);
if (m_hDesk == IntPtr.Zero)
{
return(false);
}
User32DLL.SetThreadDesktop(m_hDesk);
return(true);
}
/// <summary>
/// restore
/// </summary>
internal void EndInteraction()
{
if (m_hCurWinsta != IntPtr.Zero)
{
User32DLL.SetProcessWindowStation(m_hCurWinsta);
}
if (m_hCurDesktop != IntPtr.Zero)
{
User32DLL.SetThreadDesktop(m_hCurDesktop);
}
if (m_hWinsta != IntPtr.Zero)
{
User32DLL.CloseWindowStation(m_hWinsta);
}
if (m_hDesk != IntPtr.Zero)
{
User32DLL.CloseDesktop(m_hDesk);
}
}
private void Form1_Load(object sender, EventArgs e)
{
User32DLL.SendMessage(this.Handle, (int)SysCommands.WM_SYSCOMMAND, (int)SysCommands.SC_MONITORPOWER, 2);
}
private void button2_Click(object sender, EventArgs e)
{
User32DLL.SendMessage(this.Handle, (int)SysCommands.WM_SYSCOMMAND, (int)SysCommands.SC_MONITORPOWER, -1);
}
