Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetDeviceCaps Lib "Gdi32" (ByVal hDC As Long, ByVal nIndex As Long) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hDC As Long) As Long
Private Const LOGPIXELSX As Long = 88

Public Property Get PointsPerPixelX() As Double
   Dim hDC As Long
   hDC = GetDC(0)
   PointsPerPixelX = 72 / GetDeviceCaps(hDC, LOGPIXELSX)
   ReleaseDC 0, hDC
End Property

Private Sub SetColumnWidthsToFillSpace()
   Const BORDER_WIDTH As Long = 4

   Dim lViewportWidth As Long
   lViewportWidth = iGrid1.Width / PointsPerPixelX - BORDER_WIDTH - IIf(iGrid1.VScrollBar.Visible, iGrid1.VScrollBar.Thickness, 0)
   
   Dim lColWidth As Long
   lColWidth = lViewportWidth / iGrid1.ColCount
   
   Dim iCol As Long
   For iCol = 1 To iGrid1.ColCount - 1
      iGrid1.ColWidth(iCol) = lColWidth
   Next
   iGrid1.ColWidth(iCol) = lViewportWidth - lColWidth * (iGrid1.ColCount - 1)
End Sub