listbox creation problems

[Cheezewizz]

I'm trying to make a win32 application consisting of one treeview and one listbox side by side. The problem i'm having is that despite seemingly passing the same size to each control on creation there's a weird offset between the two that I can't explain.....

Relevant code is.......

LRESULT CALLBACK WndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{ 
	PAINTSTRUCT ps;
	HDC hDC;
	RECT rc;
	TEXTMETRIC tm;
	static HWND hLB;
	
    switch (uMsg) 
    { 
        case WM_CREATE: 
			g_hTV = CreateTreeView(hwnd);
			InitTreeViewItems(g_hTV);
			GetClientRect(hwnd, &rc);
			hLB = CreateWindowEx(0, WC_LISTBOX, NULL, WS_CHILDWINDOW | WS_VISIBLE | LBS_STANDARD, (rc.right / 2)+1, 0, rc.right/2, rc.bottom, hwnd,NULL, (HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE), NULL);

Then bit of CreateTreeView()....

	RECT rcClient; 	//dim of client area
	HWND hwndTV;    // handle to our treeview
	
	InitCommonControls();
	GetClientRect(hwndParent, &rcClient);
	hwndTV = CreateWindowEx(0, WC_TREEVIEW, "Tree View", WS_VISIBLE | WS_CHILD | WS_BORDER | TVS_HASLINES | TVS_HASBUTTONS | TVS_LINESATROOT, 0, 0, rcClient.right/2, rcClient.bottom, hwndParent, NULL, (HINSTANCE)GetWindowLong(hwndParent, GWL_HINSTANCE), NULL);

And a pic demostrating what i might have explained poorly...the red bit shows the messed up bit...

Anybody had any experience like or any thoughts on what might be causing it? Cheers peeps.