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Added some code to make a desktop switch possible.

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This commit is contained in:
RKrom 2014-12-16 07:25:10 +01:00
parent dda5b53976
commit 95df5a7565
2 changed files with 54 additions and 0 deletions
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37
GreenshotPlugin/UnmanagedHelpers/User32.cs
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@ -218,10 +218,19 @@ namespace GreenshotPlugin.UnmanagedHelpers {
[DllImport("user32", SetLastError = true)]
public static extern IntPtr CreateIconIndirect(ref IconInfo icon);
[DllImport("user32", SetLastError = true)]
public static extern IntPtr OpenInputDesktop(uint dwFlags, bool fInherit, DesktopAccessRight dwDesiredAccess);
[DllImport("user32", SetLastError = true)]
public static extern bool SetThreadDesktop(IntPtr hDesktop);
[DllImport("user32", SetLastError = true)]
public static extern bool CloseDesktop(IntPtr hDesktop);
#endregion
/// <summary>
/// Retrieves the cursor location safely, accounting for DPI settings in Vista/Windows 7.
/// </summary>
/// <returns>Point with cursor location, relative to the origin of the monitor setup
/// (i.e. negative coordinates arepossible in multiscreen setups)</returns>
public static Point GetCursorLocation() {
@ -320,6 +329,34 @@ namespace GreenshotPlugin.UnmanagedHelpers {
/// <param name="dwmsEventTime"></param>
public delegate void WinEventDelegate(IntPtr hWinEventHook, WinEvent eventType, IntPtr hwnd, EventObjects idObject, int idChild, uint dwEventThread, uint dwmsEventTime);
/// <summary>
/// A SafeHandle class implementation for the current input desktop
/// </summary>
public class SafeCurrentInputDesktopHandle : SafeHandleZeroOrMinusOneIsInvalid {
private static readonly ILog LOG = LogManager.GetLogger(typeof(SafeCurrentInputDesktopHandle));
public SafeCurrentInputDesktopHandle() : base(true) {
IntPtr hDesktop = User32.OpenInputDesktop(0, true, DesktopAccessRight.GENERIC_ALL);
if (hDesktop != IntPtr.Zero) {
SetHandle(hDesktop);
if (User32.SetThreadDesktop(hDesktop)) {
LOG.DebugFormat("Switched to desktop {0}", hDesktop);
} else {
LOG.WarnFormat("Couldn't switch to desktop {0}", hDesktop);
LOG.Error(User32.CreateWin32Exception("SetThreadDesktop"));
}
} else {
LOG.Warn("Couldn't get current desktop.");
LOG.Error(User32.CreateWin32Exception("OpenInputDesktop"));
}
}
[SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)]
protected override bool ReleaseHandle() {
return User32.CloseDesktop(handle);
}
}
/// <summary>
/// A SafeHandle class implementation for the hIcon
/// </summary>