Problem Form Windows

[Former Member]

I am developing an Addon for SAP Businnes One using Visual.Net. I need to include Windows forms but it gives me this error - the form is drawn without cantrols and hanged.

my code is:

This is the code:

Private Sub SBOapp_MenuEvent(ByRef pVal As SAPbouiCOM.MenuEvent, ByRef BubbleEvent As Boolean) Handles SBOapp.MenuEvent

If pVal.BeforeAction Then

If pVal.MenuUID = "modUSER" Then

Dim myFORM As New frmIMAGEN

myFORM.TopMost = True

myFORM.Show()

.....

Does anybody knows how to solve this problem?

This is very important an urgent for me, Somebody can help me?

thanks

[Former Member · Accepted solution]

Hi Carmen,

You must open the windows form in a new thread:

Imports System.Threading
....
....
Dim myThread As Thread
Dim myform1 As New form1
myThreadFic = New Thread(New ThreadStart(AddressOf myform1.Form1Main))
myThread.Start()

In the form1 you must add the Form1Main procedure:

Public Sub Form1Main()
Me.Show()
Do
   System.Windows.Forms.Application.DoEvents()
Loop
End Sub

Regards

Blas

[simone_pastorin · Accepted solution]

Thank you Blas! You put me on the right way.

Anyway in my case it gave me this error:

Cross thread operation not valid: Control "XXXXXXXXXX" accessed from a thread other than the thread it was created.

So I add to make some changes:

In my public void SBO_Application_MenuEvent I wrote:

//open the form on a different thread
var thread = new Thread(MyForm.StartForm);
thread.Start();

and in my class MyForm I wrote:

//start the form creating a new instance of it
public static MyForm fMyForm;
public static void StartForm()
{
    fMyForm = new MyForm();
    fMyForm.Show();
    while(true)
        Application.DoEvents();
}

Hope it can help someone!

[Former Member]

You need a separate thread to run it:

Check here:

HTH Lutz Morrien