Was trying to create a tree view control. Created . Need to know if the window was actually created. So thaught would change the color of the TreeView Control. 

Hers's my few lines of sample code

	COLORREF c= 0x44AAAA;
SendMessage(    // returns LRESULT in lResult
   oTree->hWndLV,           // (HWND) handle to destination control
   TVM_SETBKCOLOR,        // (UINT) message ID
   0,                // = 0; not used, must be zero 
   (LPARAM)c                 // = (LPARAM)(COLORREF) clrBk;
	);




Here's the description

lResult = SendMessage(    // returns LRESULT in lResult
   hWndControl,           // (HWND) handle to destination control
   TVM_SETBKCOLOR,        // (UINT) message ID
   wParam,                // = 0; not used, must be zero 
   lParam                 // = (LPARAM)(COLORREF) clrBk;
);

Parameters

    wParam
        Must be zero.
    clrBk
        COLORREF value that contains the new background color. If this value is -1, the control will revert to using the system color for the background color. 

Return Value

    Returns a COLORREF value that represents the previous background color. If this value is -1, the control was using the system color for the background color.