Thread: Tree-view Won't Function!(HELP PLEASE!)

Everytime I create a Tree-view it shows up fine. I can put items in it very easily. When I add a WM_COMMAND message it stops working. No items are visible. What could be wrong?

When something is added it sends a WM_COMMAND. So, when the WM_COMMAND is processed and zero is returned Windows thinks you added it manually. What you need to do is create another switch statement.

Code:

//Inside WndProc
switch(msg){

//More cases

	case WM_COMMAND:
		switch(HIWORD(wParam)){ //This is the notification message
                                                 //Put cases based on control
			return 0;
		}
                  default: return 1;
//Finish switches

If you do not process the msg then you need to return 1 else return 0. I think this will fix the problem you are having.

- Sean

>>When something is added it sends a WM_COMMAND.

My understanding is Treeviews return thru WM_NOTIFY not WM_COMMAND

Hence the TVN_XXXX msg's (TreeView Notify)