diff --git a/src/msw/textctrl.cpp b/src/msw/textctrl.cpp
index 294ecc8232..ac6c64be55 100644
--- a/src/msw/textctrl.cpp
+++ b/src/msw/textctrl.cpp
@@ -1334,12 +1334,7 @@ wxTextPos wxTextCtrl::GetLastPosition() const
 {
     if ( IsMultiLine() )
     {
-        int numLines = GetNumberOfLines();
-        long posStartLastLine = XYToPosition(0, numLines - 1);
-
-        long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
-
-        return posStartLastLine + lenLastLine;
+        return ::GetWindowTextLength(GetHwnd());
     }
 
     return wxTextEntry::GetLastPosition();