The following procedure makes the Excel interface invisible and shows a userform with the min and max buttons and an icon on the title bar.
When we use the code that hides the Excel interface, we lose the application button on the Windows taskbar. We use code to have it appear on the taskbar.
When you click the Minimize button, this userform is sent to the Taskbar.
Example
Place the following in a userform module. To test this code, you need a image control named image1 in Sheet1.
'API functions
Private Declare Function GetWindowLong Lib "user32" _
Alias "GetWindowLongA" _
(ByVal hWnd As Long, _
ByVal nIndex As Long) As Long
Private Declare Function SetWindowLong Lib "user32" _
Alias "SetWindowLongA" _
(ByVal hWnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long
Private Declare Function SetWindowPos Lib "user32" _
(ByVal hWnd As Long, _
ByVal hWndInsertAfter As Long, _
ByVal X As Long, _
ByVal Y As Long, _
ByVal cx As Long, _
ByVal cy As Long, _
ByVal wFlags As Long) As Long
Private Declare Function FindWindow Lib "user32" _
Alias "FindWindowA" _
(ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Private Declare Function GetActiveWindow Lib "user32.dll" _
() As Long
Private Declare Function SendMessage Lib "user32" _
Alias "SendMessageA" _
(ByVal hWnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
lParam As Any) As Long
Private Declare Function DrawMenuBar Lib "user32" _
(ByVal hWnd As Long) As Long
Private Sub UserForm_Activate()
AddIcon 'Add an icon on the titlebar
AddMinimiseButton 'Add a Minimize button to Userform
AppTasklist Me 'Add this userform into the Task bar
End Sub
Private Sub AddIcon()
'Add an icon on the titlebar
Dim hWnd As Long
Dim lngRet As Long
Dim hIcon As Long
hIcon = Sheet1.Image1.Picture.Handle
hWnd = FindWindow(vbNullString, Me.Caption)
lngRet = SendMessage(hWnd, WM_SETICON, ICON_SMALL, ByVal hIcon)
lngRet = SendMessage(hWnd, WM_SETICON, ICON_BIG, ByVal hIcon)
lngRet = DrawMenuBar(hWnd)
End Sub
Private Sub AddMinimiseButton()
'//Add a Minimize button to Userform
Dim hWnd As Long
hWnd = GetActiveWindow
Call SetWindowLong(hWnd, GWL_STYLE, _
GetWindowLong(hWnd, GWL_STYLE) Or _
WS_MINIMIZEBOX)
Call SetWindowPos(hWnd, 0, 0, 0, 0, 0, _
SWP_FRAMECHANGED Or _
SWP_NOMOVE Or _
SWP_NOSIZE)
End Sub
Private Sub AppTasklist(myForm)
'Add this userform into the Task bar
Dim WStyle As Long
Dim Result As Long
Dim hWnd As Long
hWnd = FindWindow(vbNullString, myForm.Caption)
WStyle = GetWindowLong(hWnd, GWL_EXSTYLE)
WStyle = WStyle Or WS_EX_APPWINDOW
Result = SetWindowPos(hWnd, HWND_TOP, 0, 0, 0, 0, _
SWP_NOMOVE Or _
SWP_NOSIZE Or _
SWP_NOACTIVATE Or _
SWP_HIDEWINDOW)
Result = SetWindowLong(hWnd, GWL_EXSTYLE, WStyle)
Result = SetWindowPos(hWnd, HWND_TOP, 0, 0, 0, 0, _
SWP_NOMOVE Or _
SWP_NOSIZE Or _
SWP_NOACTIVATE Or _
SWP_SHOWWINDOW)
End Sub
Private Sub UserForm_QueryClose(Cancel As Integer, CloseMode As Integer)
Application.Visible = True
End Sub
And you need to place the following in a standard module to show a userform.
Option Explicit
Sub Auto_Open()
Application.Visible = False
UserForm1.Show
End Sub