Calling Win32 API Functions in VB 2010 - Listing 4

Public Class ShellExecute

    Public Declare Function ShellExecute Lib "shell32" _
        Alias "ShellExecuteA" (ByRef hwnd As Integer, ByVal Operation As String,
                               ByVal Filename As String, ByVal Parameters As String,
                               ByVal Directory As String, ByVal ShowCommand As Integer) _
                                As Integer

    Private Declare Function GetDesktopWindow Lib "user32" () As Integer

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
        Handles Button1.Click
        Dim ParentHandle As Integer = GetDesktopWindow()
        Dim ShowMode As Integer = 1 'Normal

        Dim result As Integer = ShellExecute(ParentHandle, "Open", "Sample.txt", "", ".", ShowMode)
    End Sub
End Class

About the Author

Joe Kunk is a Microsoft MVP in Visual Basic, three-time president of the Greater Lansing User Group for .NET, and developer for Dart Container Corporation of Mason, Michigan. He's been developing software for over 30 years and has worked in the education, government, financial and manufacturing industries. Kunk's co-authored the book "Professional DevExpress ASP.NET Controls" (Wrox Programmer to Programmer, 2009). He can be reached via email at