diff --git a/rostests/dxtest/ddraw/ddrawtest.h b/rostests/dxtest/ddraw/ddrawtest.h
index 6e2464aee49..78f3190170f 100644
--- a/rostests/dxtest/ddraw/ddrawtest.h
+++ b/rostests/dxtest/ddraw/ddrawtest.h
@@ -5,7 +5,11 @@
 
 #include <stdio.h>
 #include <windows.h>
+#include <stdio.h>
 #include <ddraw.h>
+#include <ddrawi.h>
+#include <d3dhal.h>
+#include <ddrawgdi.h>
 
 #define TEST(x) \
 	if (x)\
diff --git a/rostests/dxtest/ddraw/testlist.cpp b/rostests/dxtest/ddraw/testlist.cpp
index 1c9fbe1ccb1..54043063b9a 100644
--- a/rostests/dxtest/ddraw/testlist.cpp
+++ b/rostests/dxtest/ddraw/testlist.cpp
@@ -13,6 +13,7 @@
 TEST TestList[] =
 {
 	{ "IDirectDraw: COM Stuff", Test_CreateDDraw },
+    { "IDirectDraw: Display Frequency", Test_GetMonitorFrequency },
 	{ "IDirectDraw: Display Modes", Test_DisplayModes },
 	{ "IDirectDraw: Available Video Memory", Test_GetAvailableVidMem },
 	{ "IDirectDraw: GetFourCC", Test_GetFourCCCodes },
diff --git a/rostests/dxtest/ddraw/tests/CreateDDraw.cpp b/rostests/dxtest/ddraw/tests/CreateDDraw.cpp
index ec7a71cb6b3..e1ecfa20268 100644
--- a/rostests/dxtest/ddraw/tests/CreateDDraw.cpp
+++ b/rostests/dxtest/ddraw/tests/CreateDDraw.cpp
@@ -132,6 +132,9 @@ BOOL Test_GetFourCCCodes (INT* passed, INT* failed)
 	return TRUE;
 }
 
+
+
+
 LONG WINAPI BasicWindowProc (HWND hwnd, UINT message, UINT wParam, LONG lParam)
 {
 	switch (message)
diff --git a/rostests/dxtest/ddraw/tests/DisplayModes.cpp b/rostests/dxtest/ddraw/tests/DisplayModes.cpp
index e77a8ef03db..641a1b5793f 100644
--- a/rostests/dxtest/ddraw/tests/DisplayModes.cpp
+++ b/rostests/dxtest/ddraw/tests/DisplayModes.cpp
@@ -81,3 +81,51 @@ BOOL Test_DisplayModes (INT* passed, INT* failed)
 
 	return TRUE;
 }
+
+
+BOOL Test_GetMonitorFrequency (INT* passed, INT* failed)
+{
+	LPDIRECTDRAW7 DirectDraw;
+	LPDDRAWI_DIRECTDRAW_INT This;
+
+	/* Preparations */
+	if (DirectDrawCreateEx(NULL, (VOID**)&DirectDraw, IID_IDirectDraw7, NULL) != DD_OK)
+	{
+		printf("ERROR: Failed to set up ddraw\n");
+		return FALSE;
+	}
+	This = (LPDDRAWI_DIRECTDRAW_INT)DirectDraw;
+
+	/* Here we go */
+	DWORD lpFreq;
+	DWORD temp;
+	HRESULT retVal;
+	TEST (DirectDraw->GetMonitorFrequency((PDWORD)0xdeadbeef) == DDERR_INVALIDPARAMS);
+	TEST (DirectDraw->GetMonitorFrequency(NULL) == DDERR_INVALIDPARAMS);
+
+	/* This test depns on which graphice card you have */
+	retVal = DirectDraw->GetMonitorFrequency((PDWORD)&lpFreq);
+
+	if ( retVal == DDERR_UNSUPPORTED)
+	{
+		retVal = DD_OK;
+	}
+	TEST ( retVal == DD_OK);
+
+	/* hacking testing */
+
+	/* shall return  DDERR_UNSUPPORTED */
+	This->lpLcl->lpGbl->dwMonitorFrequency = 0;
+	TEST (DirectDraw->GetMonitorFrequency(&temp) == DDERR_UNSUPPORTED);
+
+	/* shall return  DD_OK */
+	This->lpLcl->lpGbl->dwMonitorFrequency = 85;
+	TEST (DirectDraw->GetMonitorFrequency(&temp) == DD_OK);
+
+	/* restore */
+	This->lpLcl->lpGbl->dwMonitorFrequency =  lpFreq;
+
+	DirectDraw->Release();
+
+	return TRUE;
+}