How to bring "Choose Program" screen of windows in our application

Question

Dear All I need to bring 'Choose Program screen of WINDOWS(to view..CTRL+Right Click+Open With..) in my application.Kindly guide me with some sample code. Thanks and Regards V

Sam Hobbs · Answer

ShellExecute is the unmanaged way. The Process class is easier to use for managed (.Net) programs. Look for articles in this web site about that.

jibin pj · Answer

using System.Runtime.InteropServices; using Microsoft.Win32; [DllImport(shell32.dll SetLastError = true EntryPoint = ShellExecuteExW CharSet = CharSet.Unicode)] static extern bool ShellExecuteEx( ref SHELLEXECUTEINFO lpExecInfo); [StructLayout(LayoutKind.Sequential)] internal struct SHELLEXECUTEINFO { internal int cbSize; internal uint fMask; internal IntPtr hwnd; [MarshalAs(UnmanagedType.LPWStr)] internal string lpVerb; [MarshalAs(UnmanagedType.LPWStr)] internal string lpFile; [MarshalAs(UnmanagedType.LPWStr)] internal string lpParameters; [MarshalAs(UnmanagedType.LPWStr)] internal string lpDirectory; internal int nShow; internal IntPtr hInstApp; internal IntPtr lpIDList; [MarshalAs(UnmanagedType.LPWStr)] internal string lpClass; internal IntPtr hkeyClass; internal uint dwHotKey; internal IntPtr hIcon; internal IntPtr hProcess; } public const uint SW_NORMAL = 1; const int SEE_MASK_INVOKEIDLIST = 0x00000C; const int SEE_MASK_NOCLOSEPROCESS = 0x000040; const int SEE_MASK_FLAG_NO_UI = 0x000400; static void OpenAs(string file) { SHELLEXECUTEINFO sei = new SHELLEXECUTEINFO(); sei.cbSize = Marshal.SizeOf(sei); sei.hwnd = IntPtr.Zero; sei.fMask = (SEE_MASK_INVOKEIDLIST | SEE_MASK_NOCLOSEPROCESS | SEE_MASK_FLAG_NO_UI); sei.lpVerb = openas; sei.lpFile = file; sei.nShow = 1; if (!ShellExecuteEx(ref sei)) throw new System.ComponentModel.Win32Exception(); }

vipin.sasi · Answer

Hi Suman Thanks a lot for your reply I did try the code in VB.NET and C#but itz not working Code i tried--- Public Class Form1 Inherits System.Windows.Forms.Form Private Declare Function ShellExecute Lib shell32.dll Alias ShellExecuteA _ (ByVal hwnd As Long ByVal lpOperation As String ByVal lpFile As String _ ByVal lpParameters As String ByVal lpDirectory As String _ ByVal nShowCmd As Long) As Long ' Display the Open with... dialog and open the specified file with ' the selected program ' ' Example: ' ShowOpenWithDialog C:\Programs\MyProg\MyFile.xyz Sub ShowOpenWithDialog(ByVal sFileName As String) ShellExecute(0 vbNullString RUNDLL32.EXE shell32.dllOpenAs_RunDLL  _ & sFileName  vbNormalFocus) End Sub Private Sub Button1_Click(ByVal sender As System.Object ByVal e As System.EventArgs) Handles Button1.Click ShowOpenWithDialog(C:\1.doc) End Sub End Class Please let me know if you find the answer.. Thanks & Regards V

tsuman_in · Answer

I found the following Dll import code here: http://www.vb2themax.com Private Declare Function ShellExecute Lib shell32.dll Alias ShellExecuteA _ (ByVal hwnd As Long ByVal lpOperation As String ByVal lpFile As String _ ByVal lpParameters As String ByVal lpDirectory As String _ ByVal nShowCmd As Long) As Long Sub ShowOpenWithDialog(ByVal sFileName As String) ShellExecute 0 vbNullString RUNDLL32.EXE shell32.dllOpenAs_RunDLL  _ & sFileName  vbNormalFocus End Sub To get this code in your WinForms app you have to set DllImports (but I'm unsure of the alias part) using System.ComponentModel; [DllImport(shell32.dll)] private static extends long ShellExecute(long hwnd string lpOperation string lpFile string lpParameters string lpDirectory long nShowCmd) {} public static void ShowOpenWithDialog(string sFileName) { ShellExecute(0 vbNullString RUNDLL32.EXE shell32.dllOpenAs_RunDLL  + sFileName  don't know this one: vbNormalFocus ); } This should at least get you on your way. You'll have to figure out how to get the alias yourself unless someone else knows the answer to that.

vipin.sasi · Answer

I am sorry ..itz Open With Screen... Cheers! V