Search
Module:
Directory

   Desktop Functions:

   Smart Device Functions:


Show Recent Changes
Subscribe (RSS)
Misc. Pages
Comments
FAQ
Helpful Tools
Playground
Suggested Reading
Website TODO List
Download Visual Studio Add-In

MapWindowPoints (user32)
 
.
Summary

C# Signature:

[DllImport("user32", ExactSpelling = true, SetLastError = true)]
internal static extern int MapWindowPoints(IntPtr hWndFrom, IntPtr hWndTo, [In, Out] ref NativeMethods.RECT rect, [MarshalAs(UnmanagedType.U4)] int cPoints);

[DllImport("user32", ExactSpelling = true, SetLastError = true)]
internal static extern int MapWindowPoints(IntPtr hWndFrom, IntPtr hWndTo, [In, Out] ref System.Drawing.Point pt, [MarshalAs(UnmanagedType.U4)] int cPoints);

[DllImport("user32.dll", SetLastError=true)]

public static extern int MapWindowPoints(IntPtr hwndFrom, IntPtr hwndTo, ref POINT lpPoints, [MarshalAs(UnmanagedType.U4)] int cPoints);

VB.Net:

Declare Auto Function MapWindowPoints Lib "user32" (ByVal hwndFrom As IntPtr, ByVal hwndTo As IntPtr, ByRef lppt As drawing.Point, ByVal cPoints As Integer) As Integer


User-Defined Types:

RECT

POINT

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

internal static class UnsafeNativeMethods
{
   [DllImport("user32", ExactSpelling = true, SetLastError = true)]
   internal static extern int MapWindowPoints(IntPtr hWndFrom, IntPtr hWndTo, [In, Out] ref NativeMethods.RECT rect, [MarshalAs(UnmanagedType.U4)] int cPoints);
   [DllImport("user32", ExactSpelling = true, SetLastError = true)]
   internal static extern int MapWindowPoints(IntPtr hWndFrom, IntPtr hWndTo, [In, Out] ref System.Drawing.Point pt, [MarshalAs(UnmanagedType.U4)] int cPoints);

POINT[] pnt = new POINT[1] {rect.Location};

MapWindowPoints(controlFrom.Handle, controlTo.Handle, ref pnt[0], pnt.Length);

   public static System.Drawing.Point MapPointToClient(this System.Windows.Forms.IWin32Window ctrl, System.Drawing.Point pt)
   {
     return MapPoint(null, pt, ctrl);
   }

Alternative Managed API:

Do you know one? Please contribute it!

   public static System.Drawing.Point MapPoint(this System.Windows.Forms.IWin32Window ctrl, System.Drawing.Point pt, System.Windows.Forms.IWin32Window newWin = null)
   {
     MapWindowPoints(ctrl == null ? IntPtr.Zero : ctrl.Handle, newWin == null ? IntPtr.Zero : newWin.Handle, ref pt, 1);
     return pt;
   }

Documentation

   public static System.Drawing.Rectangle MapRectangle(this System.Windows.Forms.IWin32Window ctrl, System.Drawing.Rectangle rectangle, System.Windows.Forms.IWin32Window newWin = null)
   {
     NativeMethods.RECT ir = rectangle;
     MapWindowPoints(ctrl == null ? IntPtr.Zero : ctrl.Handle, newWin == null ? IntPtr.Zero : newWin.Handle, ref ir, 2);
     return ir;
   }

   public static System.Drawing.Point[] MapPoints(this System.Windows.Forms.IWin32Window ctrl, System.Drawing.Point[] points, System.Windows.Forms.IWin32Window newWin = null)
   {
     System.Drawing.Point[] pts = new System.Drawing.Point[points.Length];
     points.CopyTo(pts, 0);
     for (int i = 0; i < pts.Length; i++)
       MapWindowPoints(ctrl == null ? IntPtr.Zero : ctrl.Handle, newWin == null ? IntPtr.Zero : newWin.Handle, ref pts[i], 1);
     return pts;
   }
}

Alternative Managed API:

Do you know one? Please contribute it!

Documentation

Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

 
Access PInvoke.net directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version
Revisions