When I was doing some programming in VB.NET (for the Time Stamp program), I tried putting a modeless form in Excel. It came up as a new window in the task bar but then wouldn’t actually show on the screen. When I did a modal form it would show on the screen but also in the task bar.
.NET let’s you choose the parent window of your form. I found some code on StackOverflow in C# that gives you the proper owner window in IWin32Window form.
Public Class WindowWrapper Implements System.Windows.Forms.IWin32Window Private _hwnd As IntPtr Public Sub New(ByVal handle As IntPtr) _hwnd = handle End Sub Public ReadOnly Property Handle() As IntPtr Implements System.Windows.Forms.IWin32Window.Handle Get Return _hwnd End Get End Property End Class 'Code for implementation Dim owner As New WindowWrapper(CType(gXLApp.Hwnd, IntPtr)) gfTimeStamp = New FTimeStamp gfTimeStamp.Show (owner)