Get access to Revit Project Browser tree via Win32 api calls

[ebrown1029]

Trying to get access to the Revit Project Browser tree. so I can traverse and act on desired tree nodes. Using Spy++ to get class id as highlighted below. Then trying to SendCommand to get the root of the tree.... its returning 0; I also tried the SendCommandOn the parent window and it also failed.

Can anyone help?

The treeRoot variable in line:

int treeRoot = SendMessage((int)hWnd, TVM_GETNEXTITEM, TVGN_ROOT, IntPtr.Zero);" 

below is returning 0;

public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)

{

  Process[] processes = Process.GetProcessesByName("Revit");

  if (0 < processes.Length)

    { 

     IntPtr mainWindowHandle = processes[0].MainWindowHandle;

     EnumChildWindows(mainWindowHandle, winEnumCallBack, IntPtr.Zero);

     }

   return Result.Succeeded;

}

static bool winEnumCallBack(IntPtr hWnd, IntPtr lParam)

{

   StringBuilder className = new StringBuilder(100);

   IntPtr result = GetClassName(hWnd, className, className.Capacity);

   if (className.ToString() == "Afx:0000000140000000:b:0000000000010003:0000000000000006")

      {

      int treeRoot = SendMessage((int)hWnd, TVM_GETNEXTITEM, TVGN_ROOT, IntPtr.Zero);

// treeRoot returning 0 - Help !!!!!

      }

   return true;

}

[jeremytammik]

Dear Ebrown,

Thank you for your query.

Yes, the project browser window and its tree view appear to be non-trivial to find.

I am appending a screen snapshot of what I see in Spy++.

Based on that, I would search all Revit child windows whose caption begins with "Project Browser - ".

I would ignore the window class name if that does not lead to the desired result.

I hope this helps.

Best regards,

Jeremy