'假设你的程序中窗体名称为frmmain和frmDocument
Dim testform As Form
For Each testform In Forms
If TypeName(testform) = "frmDocument" Then
If Me.ActiveForm.Caption = testform.Caption Then
Debug.Print "标题为" + testform.Caption + "的窗体为活动窗口"
Else
Debug.Print "标题为" + testform.Caption + "的窗体为非活动窗口"
End If
End If
Next