Open file with external exe file inside VB form

[vb_enthusiast]

Hi,

I'm a newbie here and I have a problem which I which to share. I wish to open a file inside a form using an external program.

I have looked on the web for a solution but I am having only partial success. Here's the code I am using below:

Public Class Form1
    Declare Auto Function SetParent Lib "user32.dll" (ByVal hWndChild As IntPtr, ByVal hWndNewParent As IntPtr) As Integer
    Declare Auto Function SendMessage Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal Msg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
    Private Const WM_SYSCOMMAND As Integer = 274
    Private Const SC_MAXIMIZE As Integer = 61488
    Dim proc As Process
    Dim AppPath As String
    Dim strPath As String
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        AppPath = "C:\Users\User\Documents\Visual Studio 2010\Projects\Z26.exe"
        strPath = ""C:\Users\User\Documents\Visual Studio 2010\Projects\3d_tictac.bin"
        proc = Process.Start(AppPath)
        proc.WaitForInputIdle()
 
        SetParent(proc.MainWindowHandle, Panel1.Handle)
        SendMessage(proc.MainWindowHandle, WM_SYSCOMMAND, SC_MAXIMIZE, 0)
    End Sub
End Class

If I run the code as above, the exe opens in my form which is what I want. However if I change the line, proc = Process.Start(AppPath) to, proc = Process.Start(AppPath,strPath) so that I open the BIN file, the file is not opened within the form but instead in a new window. If anyone could help me with this problem that would be awesome.
Thanks