Finding the Window Handle from the Titlebar Caption

How do I find a window's handle if I know what it says in the titlebar?

I assume I'd use FindWindow(Ex?) but I just can't crack it...I know I've done it in the past, but now...? :)

I dont remember for sure..but i think if you want to get a windows handle...you should use the "GetClassName" API or something... try looking for that at http://www.allapi.com i remember seeing it there b4.



Sorry i cant provide code..but like i said.. i forgot.

He! He! He!

Here's the declare for that function:

Code:

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Public Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long

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Notice that is asks for the class name and the window handle?! Both things that I ain't got!! Duh! :rolleyes:

I'll have a look at that website tho. :)

Ta.

Use FindWindow:

Code:

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'place this code in a module
Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Function GetWindowHwnd(Caption As String) As Long
If Len(Caption) = 0 Then
GetWindowHwnd = 0
Exit Function
EndIf
GetWindowHwnd = FindWindow(vbNullString,Caption)
End Function

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Code:

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Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long

Private Sub Command1_Click()

    Dim hApp As Long
    hApp = FindWindowEx(vbNullString, "MyAppTitle"

    If hApp <> 0 Then MsgBox("The App is open")

End Sub

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I'd sorta half figured out what to do, I just couldn't workout what I should specify for FindWindow's first argument.

I'd tried Null, Empty, "", vbNull...hadn't realised there was a vbNullString I had to use!!!

Why the heck does VB have to have so many ways of saying "Bugger All"?! :)

Well... t'works now, so I'm happy. Ta.

The First Arg is Classname, almost all API's that will be left blank are either vbNullString or 0 (for numbers). You use classname if you want to get any instance, say:

Code:

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FindWindow("IEFrame",vbNullString)
'vs.
FindWindow(vbNullString,"VB Q and A - Reply to Topic - Microsoft Internet Explorer")

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I think that is correct:)

FindWindowEx's arguments are somewhat out of wack. Here is a proper definition for it.

Code:

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Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hParent As Long, ByVal hChild As Long, ByVal lpClassName As String, ByVal lpWindowName As String) As Long

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