Please Note: This article is written for users of the following Microsoft Word versions: 2007, 2010, 2013, 2016, 2019, and Word in Microsoft 365. If you are using an earlier version (Word 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Word, click here: Detecting an Open Dialog Box.
Written by Allen Wyatt (last updated May 11, 2022)
This tip applies to Word 2007, 2010, 2013, 2016, 2019, and Word in Microsoft 365
Thomas has a macro that performs various functions at timed intervals. Some of those functions should not be performed if a dialog box is open on the screen, because trying to perform them will cause an error in the functions. He wonders if there is some way, within the macro, to detect if a dialog box—any dialog box—is currently open. Thomas would rather detect the open dialog box rather than deal with a generated error.
Perhaps the only way to attempt to do this is to use FindWindow, which is actually part of the Windows API. Its purpose is to retrieve a handle to a particular open window. (A dialog box is nothing but an open window, and each dialog box has a name.) This approach won't tell you if any dialog box is open, but it will tell you if a specific dialog box is open.
Here is a quick example to show how the FindWindow function can be used:
Declare Function FindWindow Lib "user32" Alias "FindWindowA" _ (ByVal wClassName As Any, ByVal wWindowName As String) As Long Sub testDialogOpen() Dim wHandle As Long Dim wName As String wName = "Find and Replace" wHandle = FindWindow(0&, wName) If wHandle = 0 Then MsgBox "Dialog window is not open" Else MsgBox "Dialog window is open" End If End Sub
Note that the FindWindow function needs to be declared outside of your VBA procedure. Then, within the procedure, you need to specify the name of the dialog box you want to find out about. This is the name that appears in the title bar for the dialog box, and the FindWindow function is case insensitive. The return value for FindWindow will be a handle for the dialog box, if it is open. If it is not open, then the function returns a 0.
Remember, too, that dialog boxes can be of two types: modal and non-modal. If a particular dialog box is modal, then it must be dismissed before any other actions can be taken on the system. You'll want to do extensive testing with the dialog boxes at some point, as you may get different performance from your macro depending on whether an open dialog box is modal or not.
Note:
WordTips is your source for cost-effective Microsoft Word training. (Microsoft Word is the most popular word processing software in the world.) This tip (12356) applies to Microsoft Word 2007, 2010, 2013, 2016, 2019, and Word in Microsoft 365. You can find a version of this tip for the older menu interface of Word here: Detecting an Open Dialog Box.
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2024-09-23 17:55:54
Peter A. Tanner
Hi Allen,
This statement at the top of the article is not correct: "This tip applies to Word 2007, 2010, 2013, 2016, 2019, and Word in Microsoft 365"
I would like to correct my post made back in May...
I have at last found Microsoft's documentation on the FindWindow declaration for all Word version using VBA7 on 64-bit Windows. They give the following, and it works:
Declare PtrSafe Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As LongPtr
Best regards,
Peter
2024-05-11 10:09:35
Peter A. Tanner
G'day Allen,
Thanks for this tip! Just what I needed!
For 64bit Word, the declaration has to be done like this:
Declare PtrSafe Function FindWindow Lib "User32" Alias "FindWindowA" (ByVal wClassName As Any, ByVal wWindowName As String) As LongPtr
Best regards,
Peter
2022-05-11 17:32:16
Chester Hood
Since FindWindow is part of the Windows API, will this approach work with any of the Office VBA products? Specifically, I have VBA code in Excel workbooks, Access applications, and Outlook inbox processing. Thanks.
2022-05-11 10:21:54
Philip
Is there a way to do this on a Mac?
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