diff --git a/src/Greenshot.Base/UnmanagedHelpers/Enums/ExtendedWindowStyleFlags.cs b/src/Greenshot.Base/UnmanagedHelpers/Enums/ExtendedWindowStyleFlags.cs
index cbd81219c..aaeb23fa9 100644
--- a/src/Greenshot.Base/UnmanagedHelpers/Enums/ExtendedWindowStyleFlags.cs
+++ b/src/Greenshot.Base/UnmanagedHelpers/Enums/ExtendedWindowStyleFlags.cs
@@ -28,9 +28,44 @@ namespace Greenshot.Base.UnmanagedHelpers.Enums
     [SuppressMessage("ReSharper", "InconsistentNaming")]
     public enum ExtendedWindowStyleFlags : uint
     {
-        WS_EX_TOOLWINDOW = 0x00000080,
+        WS_EX_DLGMODALFRAME = 0x00000001,
+        WS_EX_NOPARENTNOTIFY = 0x00000004,
+        WS_EX_TOPMOST = 0x00000008,
+        WS_EX_ACCEPTFILES = 0x00000010,
+        WS_EX_TRANSPARENT = 0x00000020,
 
-        WS_EX_NOREDIRECTIONBITMAP =
-            0x00200000, //The window does not render to a redirection surface. This is for windows that do not have visible content or that use mechanisms other than surfaces to provide their visual.
+        //#if(WINVER >= 0x0400)
+        WS_EX_MDICHILD = 0x00000040,
+        WS_EX_TOOLWINDOW = 0x00000080,
+        WS_EX_WINDOWEDGE = 0x00000100,
+        WS_EX_CLIENTEDGE = 0x00000200,
+        WS_EX_CONTEXTHELP = 0x00000400,
+
+        WS_EX_RIGHT = 0x00001000,
+        WS_EX_LEFT = 0x00000000,
+        WS_EX_RTLREADING = 0x00002000,
+        WS_EX_LTRREADING = 0x00000000,
+        WS_EX_LEFTSCROLLBAR = 0x00004000,
+        WS_EX_RIGHTSCROLLBAR = 0x00000000,
+
+        WS_EX_CONTROLPARENT = 0x00010000,
+        WS_EX_STATICEDGE = 0x00020000,
+        WS_EX_APPWINDOW = 0x00040000,
+
+        //WS_EX_OVERLAPPEDWINDOW = (WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE),
+        //WS_EX_PALETTEWINDOW    = (WS_EX_WINDOWEDGE | WS_EX_TOOLWINDOW | WS_EX_TOPMOST),
+
+        WS_EX_LAYERED = 0x00080000,
+        WS_EX_NOINHERITLAYOUT = 0x00100000, // Disable inheritence of mirroring by children
+        WS_EX_NOREDIRECTIONBITMAP = 0x00200000, //The window does not render to a redirection surface. This is for windows that do not have visible content or that use mechanisms other than surfaces to provide their visual.
+        WS_EX_LAYOUTRTL = 0x00400000, // Right to left mirroring
+        /// <summary>
+        /// Paints all descendants of a window in bottom-to-top painting order using double-buffering.
+        /// Bottom-to-top painting order allows a descendent window to have translucency (alpha) and transparency (color-key) effects, but only if the descendent window also has the WS_EX_TRANSPARENT bit set.
+        /// Double-buffering allows the window and its descendents to be painted without flicker.
+        /// This cannot be used if the window has a class style of either CS_OWNDC or CS_CLASSDC.
+        /// </summary>
+        WS_EX_COMPOSITED = 0x02000000,
+        WS_EX_NOACTIVATE = 0x08000000 // A top-level window created with this style does not become the foreground window when the user clicks it. The system does not bring this window to the foreground when the user minimizes or closes the foreground window.
     }
 }
\ No newline at end of file
diff --git a/src/Greenshot.Base/UnmanagedHelpers/Enums/WindowStyleFlags.cs b/src/Greenshot.Base/UnmanagedHelpers/Enums/WindowStyleFlags.cs
index 8c64ee09a..603e58196 100644
--- a/src/Greenshot.Base/UnmanagedHelpers/Enums/WindowStyleFlags.cs
+++ b/src/Greenshot.Base/UnmanagedHelpers/Enums/WindowStyleFlags.cs
@@ -29,8 +29,24 @@ namespace Greenshot.Base.UnmanagedHelpers.Enums
     /// </summary>
     [Flags]
     [SuppressMessage("ReSharper", "InconsistentNaming")]
-    public enum WindowStyleFlags : long
+    public enum WindowStyleFlags : int
     {
+        //WS_OVERLAPPED       = 0x00000000,
+        WS_POPUP = -2147483648,
+        WS_CHILD = 0x40000000,
+        WS_MINIMIZE = 0x20000000,
         WS_VISIBLE = 0x10000000,
+        WS_DISABLED = 0x08000000,
+        WS_CLIPSIBLINGS = 0x04000000,
+        WS_CLIPCHILDREN = 0x02000000,
+        WS_MAXIMIZE = 0x01000000,
+        WS_BORDER = 0x00800000,
+        WS_DLGFRAME = 0x00400000,
+        WS_VSCROLL = 0x00200000,
+        WS_HSCROLL = 0x00100000,
+        WS_SYSMENU = 0x00080000,
+        WS_THICKFRAME = 0x00040000,
+        WS_GROUP = 0x00020000,
+        WS_TABSTOP = 0x00010000
     }
 }
\ No newline at end of file
diff --git a/src/Greenshot/Forms/CaptureForm.cs b/src/Greenshot/Forms/CaptureForm.cs
index 6176c732e..a737ba3b0 100644
--- a/src/Greenshot/Forms/CaptureForm.cs
+++ b/src/Greenshot/Forms/CaptureForm.cs
@@ -36,6 +36,7 @@ using Greenshot.Base.IniFile;
 using Greenshot.Base.Interfaces;
 using Greenshot.Base.Interfaces.Ocr;
 using Greenshot.Base.UnmanagedHelpers;
+using Greenshot.Base.UnmanagedHelpers.Enums;
 using Greenshot.Editor.Helpers;
 
 namespace Greenshot.Forms
@@ -111,7 +112,8 @@ namespace Greenshot.Forms
             get
             {
                 CreateParams createParams = base.CreateParams;
-                createParams.ExStyle |= 0x02000000;
+                createParams.ExStyle |= (int)ExtendedWindowStyleFlags.WS_EX_COMPOSITED;
+                createParams.Style = (int)WindowStyleFlags.WS_POPUP;
                 return createParams;
             }
         }