gdiplus: Implement GdipSetInfinite.

dlls/gdiplus/region.c

@@ -319,12 +319,17 @@ GpStatus WINGDIPAPI GdipSetEmpty(GpRegion *region)
 
 GpStatus WINGDIPAPI GdipSetInfinite(GpRegion *region)
 {
-    static int calls;
+    GpStatus stat;
 
-    if(!(calls++))
-        FIXME("not implemented\n");
+    if (!region)
+        return InvalidParameter;
 
-    return NotImplemented;
+    TRACE("%p", region);
+
+    delete_element(&region->node);
+    stat = init_region(region, RegionDataInfiniteRect);
+
+    return stat;
 }
 
 GpStatus WINGDIPAPI GdipTransformRegion(GpRegion *region, GpMatrix *matrix)

dlls/gdiplus/tests/region.c

@@ -97,10 +97,13 @@ todo_wine
     expect_magic((DWORD*)(buf + 2));
     expect_dword(buf + 3, 0);
     expect_dword(buf + 4, RGNDATA_EMPTY_RECT);
+}
 
     status = GdipSetInfinite(region);
     ok(status == Ok, "status %08x\n", status);
     status = GdipGetRegionDataSize(region, &needed);
+todo_wine
+{
     ok(status == Ok, "status %08x\n", status);
     expect(20, needed);
     status = GdipGetRegionData(region, (BYTE*)buf, sizeof(buf), &needed);