static public void Protect(IntPtr hWnd)
{
bool isProtected = false;
if (NativeCode.IsWindow(hWnd))
{
if (IsDWMEnabled())
{
try
{
isProtected = NativeCode.SetWindowDisplayAffinity(hWnd, NativeCode.WDA_MONITOR);
if (isProtected)
{
NativeCode.SetProp(hWnd, "protect_affinity", (IntPtr)1);
}
}
catch (System.Exception ex)
{
//Possibly Windows Vista
LogFile.Warn("exception in Protect() while setting affinity:" + ex.Message);
}
}
if (isProtected == false)
{
try
{
//Disable DWM, that it cannot be enabled while the application is running
NativeCode.DwmEnableComposition(NativeCode.DWM_EC_DISABLECOMPOSITION);
dwmDisabled = true;
}
catch (System.Exception ex)
{
//Possibly Windows XP...
LogFile.Warn("exception in Protect() while disabling DWM:" + ex.Message);
}
try
{
if ((NativeCode.GetWindowLong(hWnd, NativeCode.GWL_EXSTYLE) & NativeCode.WS_EX_LAYERED) == 0)
{
NativeCode.SetProp(hWnd, "protect_layer_added", (IntPtr)1);
}
NativeCode.SetWindowLong(hWnd, NativeCode.GWL_EXSTYLE, NativeCode.GetWindowLong(hWnd, NativeCode.GWL_EXSTYLE) | NativeCode.WS_EX_LAYERED);
NativeCode.SetLayeredWindowAttributes(hWnd, 0, 255, NativeCode.LWA_ALPHA);
}
catch (System.Exception ex)
{
LogFile.Error("exception in Protect() while setting layered window:", ex);
}
try
{
if (magInit)
{
IntPtr magWnd = NativeCode.CreateWindow(0, NativeCode.WC_MAGNIFIER, "", NativeCode.WS_CHILD, 0, 0, 1, 1, hWnd, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
NativeCode.SetProp(hWnd, "protect_mag", (IntPtr)1);
NativeCode.SetProp(hWnd, "protect_mag_hwnd", magWnd);
}
}
catch (System.Exception ex)
{
LogFile.Error("exception in Protect() while creating maginification window:", ex);
}
try
{
NativeCode.RedrawWindow(hWnd, IntPtr.Zero, IntPtr.Zero, NativeCode.RDW_FRAME | NativeCode.RDW_UPDATENOW | NativeCode.RDW_INVALIDATE);
NativeCode.UpdateWindow(hWnd);
}
catch (System.Exception ex)
{
LogFile.Error("exception in Protect() while refreshing window:", ex);
}
}
}
else
{
LogFile.Error("no vailid window handle forwarded to Protect()");
}
}