diff --git a/dlls/gdiplus/gdiplus.spec b/dlls/gdiplus/gdiplus.spec
index 68e9c16ed06..e1878e9c8b1 100644
--- a/dlls/gdiplus/gdiplus.spec
+++ b/dlls/gdiplus/gdiplus.spec
@@ -522,7 +522,7 @@
 @ stub GdipSetEffectParameters
 @ stub GdipSetEmpty
 @ stub GdipSetImageAttributesCachedBackground
-@ stub GdipSetImageAttributesColorKeys
+@ stdcall GdipSetImageAttributesColorKeys(ptr long long long)
 @ stub GdipSetImageAttributesColorMatrix
 @ stub GdipSetImageAttributesGamma
 @ stub GdipSetImageAttributesNoOp
diff --git a/dlls/gdiplus/imageattributes.c b/dlls/gdiplus/imageattributes.c
index 29b85493d4e..bfef8b32f37 100644
--- a/dlls/gdiplus/imageattributes.c
+++ b/dlls/gdiplus/imageattributes.c
@@ -48,6 +48,20 @@ GpStatus WINGDIPAPI GdipDisposeImageAttributes(GpImageAttributes *imageattr)
     return Ok;
 }
 
+GpStatus WINGDIPAPI GdipSetImageAttributesColorKeys(GpImageAttributes *imageattr,
+    ColorAdjustType type, BOOL enableFlag, ARGB colorLow, ARGB colorHigh)
+{
+    static int calls;
+
+    if(!imageattr)
+        return InvalidParameter;
+
+    if(!(calls++))
+        FIXME("not implemented\n");
+
+    return NotImplemented;
+}
+
 GpStatus WINGDIPAPI GdipSetImageAttributesWrapMode(GpImageAttributes *imageAttr,
     WrapMode wrap, ARGB argb, BOOL clamp)
 {
diff --git a/include/Makefile.in b/include/Makefile.in
index 05dc60e2814..9fb456a7df2 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -164,6 +164,7 @@ SRCDIR_INCLUDES = \
 	fci.h \
 	fdi.h \
 	gdiplus.h \
+	gdipluscolormatrix.h \
 	gdiplusenums.h \
 	gdiplusflat.h \
 	gdiplusgpstubs.h \
diff --git a/include/gdiplus.h b/include/gdiplus.h
index 1f4ae78a932..9e72f52355a 100644
--- a/include/gdiplus.h
+++ b/include/gdiplus.h
@@ -34,6 +34,7 @@ namespace Gdiplus
 #include "gdipluspixelformats.h"
 #include "gdiplusmetaheader.h"
 #include "gdiplusimaging.h"
+#include "gdipluscolormatrix.h"
 #include "gdiplusgpstubs.h"
 
     namespace DllExports
@@ -52,6 +53,7 @@ namespace Gdiplus
 #include "gdipluspixelformats.h"
 #include "gdiplusmetaheader.h"
 #include "gdiplusimaging.h"
+#include "gdipluscolormatrix.h"
 #include "gdiplusgpstubs.h"
 
 #include "gdiplusflat.h"
diff --git a/include/gdipluscolormatrix.h b/include/gdipluscolormatrix.h
new file mode 100644
index 00000000000..893471c7ad7
--- /dev/null
+++ b/include/gdipluscolormatrix.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2007 Google (Evan Stade)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef _GDIPLUSCOLORMATRIX_H
+#define _GDIPLUSCOLORMATRIX_H
+
+enum ColorAdjustType
+{
+    ColorAdjustTypeDefault,
+    ColorAdjustTypeBitmap,
+    ColorAdjustTypeBrush,
+    ColorAdjustTypePen,
+    ColorAdjustTypeText,
+    ColorAdjustTypeCount,
+    ColorAdjustTypeAny
+};
+
+#ifndef __cplusplus
+
+typedef enum ColorAdjustType ColorAdjustType;
+
+#endif  /* end of c typedefs */
+
+#endif  /* _GDIPLUSCOLORMATRIX_H */
diff --git a/include/gdiplusflat.h b/include/gdiplusflat.h
index 4f0d88d8e65..e8b067d2dba 100644
--- a/include/gdiplusflat.h
+++ b/include/gdiplusflat.h
@@ -160,6 +160,8 @@ GpStatus WINGDIPAPI GdipSaveImageToStream(GpImage*,IStream*,
 
 GpStatus WINGDIPAPI GdipCreateImageAttributes(GpImageAttributes**);
 GpStatus WINGDIPAPI GdipDisposeImageAttributes(GpImageAttributes*);
+GpStatus WINGDIPAPI GdipSetImageAttributesColorKeys(GpImageAttributes*,
+    ColorAdjustType,BOOL,ARGB,ARGB);
 GpStatus WINGDIPAPI GdipSetImageAttributesWrapMode(GpImageAttributes*,WrapMode,
     ARGB,BOOL);