C#

class frmMain
{
   ...
   public PopulateTreeView()
   {
      // fill the tree view here.
   }
}

// In your other class, you can call it like this:
frmMain mainInstance = new frmMain();
frmMain.PopulateTreeView(); 

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class MainForm : Form
{
   private void frmMain_Load( object sender, EventArgs e )
   {
       this.PopulateList( @"C:\ognac\Is\Yummy" );
   }
   public void PopulateList( string folderPath )
   {
      // blah blah blah
   }
}
class SomeOtherForm : Form
{
   private MainForm mainForm;
   public SomeOtherForm( MainForm mainForm )
   {
      this.mainForm = mainForm;
   }
   public void btnWhatever_Click( object sender, EventArgs e )
   {
      this.mainForm.PopulateList( @"A:\rmagnac\Is\Yummy" );
   }
}

student_rhr wrote:

Would it be a good idea to store the video files (typically over 70MB) into a DataBase

Lav Pathak wrote:

Cannot switch to any other application.
Can not open windows explorer or press ctrl+alt+delete.

Lav Pathak wrote:

I Dont know what win32 calls i shuold make to make it system wide modal.

private void OnLoad(object sender, EventArgs e)
{
  Int32 nStyle = GetWindowLong (this.Handle, (-16));  // GWL_STYLE
  nStyle |= 0x02;  // DS_SYSMODAL
  nStyle = SetWindowLong (this.Handle, (-16), nStyle);
}

[DllImport("User32.dll", SetLastError=true)]
private static extern Int32 GetWindowLong
 (IntPtr hWnd, int nIndex);

[DllImport("User32.dll", SetLastError=true)]
private static extern Int32 SetWindowLong
 (IntPtr hWnd, int nIndex, Int32 nNewStyle);

public Form1()
{
  InitializeComponent ();

  Timer timer = new Timer();
  timer.Interval = 1;
  timer.Tick += new EventHandler (timer_Tick);
  timer.Start();
}

void timer_Tick(object sender, EventArgs e)
{
  this.TopMost = true;
  this.Activate();
}

Ravi Bhavnani wrote:

Apparently[^], MS doesn't want us to create system modal dialogs.