API: Put a custom icon in the form's caption bar

    There are no direct way to place a custom icon in a  form's caption bar. However, by loading an ICO file into memory, we can assign the icon to a form by sending a WM_SETICON message to the window.

'*********** Code Start ********
' This code was originally written by Klaus Probst.
' It is not to be altered or distributed,
' except as part of an application.
' You are free to use it in any application,
' provided the copyright notice is left unchanged.
'
' Code Courtesy of
' Klaus Probst
'
'// Place all this in a module
Public Declare Function LoadImage Lib "user32" _
   Alias "LoadImageA" _
   (ByVal hInst As Long, _
   ByVal lpsz As String, _
   ByVal un1 As Long, _
   ByVal n1 As Long, _
   ByVal n2 As Long, _
   ByVal un2 As Long) _
   As Long
   
Public Declare Function SendMessage Lib "user32" _
   Alias "SendMessageA" _
   (ByVal hWnd As Long, _
   ByVal wMsg As Long, _
   ByVal wParam As Long, _
   LParam As Any) _
   As Long
   
   
Public Const WM_GETICON = &H7F
Public Const WM_SETICON = &H80
Public Const ICON_SMALL = 0
Public Const ICON_BIG = 1

'// LoadImage() image types
Public Const IMAGE_BITMAP = 0
Public Const IMAGE_ICON = 1
Public Const IMAGE_CURSOR = 2
Public Const IMAGE_ENHMETAFILE = 3

'// LoadImage() flags
Public Const LR_DEFAULTCOLOR = &H0
Public Const LR_MONOCHROME = &H1
Public Const LR_COLOR = &H2
Public Const LR_COPYRETURNORG = &H4
Public Const LR_COPYDELETEORG = &H8
Public Const LR_LOADFROMFILE = &H10
Public Const LR_LOADTRANSPARENT = &H20
Public Const LR_DEFAULTSIZE = &H40
Public Const LR_LOADMAP3DCOLORS = &H1000
Public Const LR_CREATEDIBHeader = &H2000
Public Const LR_COPYFROMRESOURCE = &H4000
Public Const LR_SHARED = &H8000

Public Function SetFormIcon(hWnd As Long, IconPath As String) As Boolean
Dim hIcon As Long

   hIcon = LoadImage(0&, IconPath, IMAGE_ICON, 16, 16, LR_LOADFROMFILE)

   '// wParam = 0; Setting small icon. wParam = 1; setting large icon
   If hIcon <> 0 Then
      Call SendMessage(hWnd, WM_SETICON, 0, ByVal hIcon)
      SetFormIcon = True
   End If
End Function
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