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Cancel modal dialogs in AutoCAD from a VB application

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发表于 2021-1-13 03:02:53 | 显示全部楼层 |阅读模式

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问题:

I am trying to get an interface pointer to the AutoCAD Application, using the
GetObject() from a VB client application.  But if a command or Modal dialog
(e.g. layer dialog) is active, then AutoCAD is not able to process the ActiveX
Automation request and  GetObject() fails.  How can I cancel any modal dialog
that s active in AutoCAD?

解答:

You can make use of Win32 API calls to enumerate the windows and then check
for the parent and window style of the window.  If the parent of a window is
"AutoCAD", then we know that it is a dialog related to AutoCAD.  Next, check
to see if the window style is of type WS_POPUPWINDOW and WS_VISIBLE.  If it
is, then we know this is a modal dialog active in AutoCAD.  The attached VB
sample shows how to implement the above.  Please refer to the Microsoft s MSDN
library (www.microsoft.com) for complete details on the Win32 API calls that
are used in this project.

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