diff --git a/include/wx/os2/region.h b/include/wx/os2/region.h
index f732b3b796..e524cc157e 100644
--- a/include/wx/os2/region.h
+++ b/include/wx/os2/region.h
@@ -36,7 +36,7 @@ class WXDLLEXPORT wxRegion : public wxGDIObject {
 DECLARE_DYNAMIC_CLASS(wxRegion);
     friend class WXDLLEXPORT wxRegionIterator;
 public:
-    wxRegion(long x, long y, long w, long h);
+    wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
     wxRegion(const wxRect& rect);
     wxRegion(WXHRGN hRegion); // Hangs on to this region
@@ -55,29 +55,29 @@ public:
     void Clear();
 
     // Union rectangle or region with this.
-    inline bool Union(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_OR); }
+    inline bool Union(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { return Combine(x, y, width, height, wxRGN_OR); }
     inline bool Union(const wxRect& rect) { return Combine(rect, wxRGN_OR); }
     inline bool Union(const wxRegion& region) { return Combine(region, wxRGN_OR); }
 
     // Intersect rectangle or region with this.
-    inline bool Intersect(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_AND); }
+    inline bool Intersect(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { return Combine(x, y, width, height, wxRGN_AND); }
     inline bool Intersect(const wxRect& rect)  { return Combine(rect, wxRGN_AND); }
     inline bool Intersect(const wxRegion& region)  { return Combine(region, wxRGN_AND); }
 
     // Subtract rectangle or region from this:
     // Combines the parts of 'this' that are not part of the second region.
-    inline bool Subtract(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_DIFF); }
+    inline bool Subtract(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { return Combine(x, y, width, height, wxRGN_DIFF); }
     inline bool Subtract(const wxRect& rect)  { return Combine(rect, wxRGN_DIFF); }
     inline bool Subtract(const wxRegion& region)  { return Combine(region, wxRGN_DIFF); }
 
     // XOR: the union of two combined regions except for any overlapping areas.
-    inline bool Xor(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_XOR); }
+    inline bool Xor(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { return Combine(x, y, width, height, wxRGN_XOR); }
     inline bool Xor(const wxRect& rect)  { return Combine(rect, wxRGN_XOR); }
     inline bool Xor(const wxRegion& region)  { return Combine(region, wxRGN_XOR); }
 
     //# Information on region
     // Outer bounds of region
-    void GetBox(long& x, long& y, long&w, long &h) const;
+    void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
     wxRect GetBox() const ;
 
     // Is region empty?
@@ -86,16 +86,16 @@ public:
 
     //# Tests
     // Does the region contain the point (x,y)?
-    wxRegionContain Contains(long x, long y) const;
+    wxRegionContain Contains(wxCoord x, wxCoord y) const;
     // Does the region contain the point pt?
     wxRegionContain Contains(const wxPoint& pt) const;
     // Does the region contain the rectangle (x, y, w, h)?
-    wxRegionContain Contains(long x, long y, long w, long h) const;
+    wxRegionContain Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const;
     // Does the region contain the rectangle rect?
     wxRegionContain Contains(const wxRect& rect) const;
 
 // Internal
-    bool Combine(long x, long y, long width, long height, wxRegionOp op);
+    bool Combine(wxCoord x, wxCoord y, wxCoord width, wxCoord height, wxRegionOp op);
     bool Combine(const wxRegion& region, wxRegionOp op);
     bool Combine(const wxRect& rect, wxRegionOp op);
 
@@ -119,12 +119,12 @@ public:
     void operator ++ ();
     void operator ++ (int);
 
-    long GetX() const;
-    long GetY() const;
-    long GetW() const;
-    long GetWidth() const { return GetW(); }
-    long GetH() const;
-    long GetHeight() const { return GetH(); }
+    wxCoord GetX() const;
+    wxCoord GetY() const;
+    wxCoord GetW() const;
+    wxCoord GetWidth() const { return GetW(); }
+    wxCoord GetH() const;
+    wxCoord GetHeight() const { return GetH(); }
     wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
 
 private:
diff --git a/src/os2/region.cpp b/src/os2/region.cpp
index c991f9c046..2ea5f9d684 100644
--- a/src/os2/region.cpp
+++ b/src/os2/region.cpp
@@ -67,7 +67,7 @@ wxRegion::wxRegion(WXHRGN hRegion)
     M_REGION = (HRGN) hRegion;
 }
 
-wxRegion::wxRegion(long x, long y, long w, long h)
+wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 {
     m_refData = new wxRegionRefData;
     // TODO create rect region
@@ -104,7 +104,7 @@ void wxRegion::Clear()
 }
 
 //! Combine rectangle (x, y, w, h) with this.
-bool wxRegion::Combine(long x, long y, long width, long height, wxRegionOp op)
+bool wxRegion::Combine(wxCoord x, wxCoord y, wxCoord width, wxCoord height, wxRegionOp op)
 {
     // Don't change shared data
     if (!m_refData) {
@@ -195,7 +195,7 @@ bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
 //-----------------------------------------------------------------------------
 
 // Outer bounds of region
-void wxRegion::GetBox(long& x, long& y, long&w, long &h) const
+void wxRegion::GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const
 {
     if (m_refData) {
         // TODO get box
@@ -206,7 +206,7 @@ void wxRegion::GetBox(long& x, long& y, long&w, long &h) const
 
 wxRect wxRegion::GetBox() const
 {
-    long x, y, w, h;
+    wxCoord x, y, w, h;
     GetBox(x, y, w, h);
     return wxRect(x, y, w, h);
 }
@@ -223,7 +223,7 @@ bool wxRegion::Empty() const
 //-----------------------------------------------------------------------------
 
 // Does the region contain the point (x,y)?
-wxRegionContain wxRegion::Contains(long x, long y) const
+wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y) const
 {
     bool    bOK = FALSE; // temporary
     if (!m_refData)
@@ -250,7 +250,7 @@ wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 }
 
 // Does the region contain the rectangle (x, y, w, h)?
-wxRegionContain wxRegion::Contains(long x, long y, long w, long h) const
+wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const
 {
     bool    bOK = FALSE; // temporary
     if (!m_refData)
@@ -269,7 +269,7 @@ wxRegionContain wxRegion::Contains(const wxRect& rect) const
     if (!m_refData)
         return wxOutRegion;
 
-    long x, y, w, h;
+    wxCoord x, y, w, h;
     x = rect.x;
     y = rect.y;
     w = rect.GetWidth();
@@ -356,28 +356,28 @@ void wxRegionIterator::operator ++ (int)
         ++m_current;
 }
 
-long wxRegionIterator::GetX() const
+wxCoord wxRegionIterator::GetX() const
 {
     if (m_current < m_numRects)
         return m_rects[m_current].x;
     return 0;
 }
 
-long wxRegionIterator::GetY() const
+wxCoord wxRegionIterator::GetY() const
 {
     if (m_current < m_numRects)
         return m_rects[m_current].y;
     return 0;
 }
 
-long wxRegionIterator::GetW() const
+wxCoord wxRegionIterator::GetW() const
 {
     if (m_current < m_numRects)
         return m_rects[m_current].width ;
     return 0;
 }
 
-long wxRegionIterator::GetH() const
+wxCoord wxRegionIterator::GetH() const
 {
     if (m_current < m_numRects)
         return m_rects[m_current].height;