FEATURE-992: Fixing a problem with the editor not becoming the foreground window. [skip ci]

Greenshot/Forms/ImageEditorForm.cs

@@ -176,6 +176,7 @@ namespace Greenshot {
 					Text = _surface.CaptureDetails.Title + " - " + Language.GetString(LangKey.editor_title);
 				}
 			}
+			Activate();
 			WindowDetails.ToForeground(Handle);
 		}
 

GreenshotPlugin/Core/WindowsHelper.cs

@@ -1254,7 +1254,25 @@ namespace GreenshotPlugin.Core {
 		/// <summary>
 		/// Set the window as foreground window
 		/// </summary>
-		public static void ToForeground(IntPtr handle) {
+		public static void ToForeground(IntPtr handle)
+		{
+
+			// Do nothing if the window is already in the foreground
+			if (User32.GetForegroundWindow() == handle)
+			{
+				return;
+			}
+
+			const byte ALT = 0xA4;
+			const int EXTENDEDKEY = 0x1;
+			const int KEYUP = 0x2;
+
+			// Simulate an "ALT" key press.
+			User32.keybd_event(ALT, 0x45, EXTENDEDKEY | 0, 0);
+			// Simulate an "ALT" key release.
+			User32.keybd_event(ALT, 0x45, EXTENDEDKEY | KEYUP, 0);
+
+			// Show window in forground.
 			User32.SetForegroundWindow(handle);
 		}
 

GreenshotPlugin/UnmanagedHelpers/User32.cs

@@ -62,6 +62,8 @@ namespace GreenshotPlugin.UnmanagedHelpers {
 
 		#region DllImports
 		[DllImport("user32", SetLastError = true)]
+		public static extern bool keybd_event(byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);
+		[DllImport("user32", SetLastError = true)]
 		[return: MarshalAs(UnmanagedType.Bool)]
 		public static extern bool IsWindowVisible(IntPtr hWnd);
 		[DllImport("user32", SetLastError = true)]