Изменить цвет кнопки. BS_OWNERDRAW

#include<conio.h>
#include<Windows.h>
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);
char szName[] = "window";
HDC hDC, hDC2;
HWND hWnd, hWnd2,
btn, btn2;
int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nFunsterStil)
{
    WNDCLASSEX wincl;
    MSG messages;
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szName;
    wincl.lpfnWndProc = WindowProcedure;
    wincl.style = CS_DBLCLKS | CS_DROPSHADOW;
    wincl.cbSize = sizeof (WNDCLASSEX);
    wincl.hIcon = LoadIcon(0, IDI_WINLOGO);
    wincl.hIconSm = LoadIcon(0, IDI_WINLOGO);
    wincl.hCursor = LoadCursor(NULL, IDC_HAND);
    wincl.lpszMenuName = NULL;
    wincl.cbClsExtra = 0;
    wincl.cbWndExtra = 0;
    wincl.hbrBackground = CreateSolidBrush RGB(102, 0, 255);
    if (!RegisterClassEx(&wincl))
        return 0;
    hWnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_TOOLWINDOW, szName, "Square Go", WS_OVERLAPPEDWINDOW, 0, 0, 1000, 600, NULL, NULL, NULL, NULL);
    btn = CreateWindow("BUTTON", "Start The Game", WS_VISIBLE | WS_CHILD | BS_OWNERDRAW, 400, 400, 150, 50, hWnd, NULL, NULL, NULL);
    btn2 = CreateWindow("BUTTON", "Control", WS_VISIBLE | WS_CHILD | BS_CENTER, 400, 460, 150, 50, hWnd, NULL, NULL, NULL);
    ShowWindow(hWnd, SW_SHOW);
    while (GetMessage(&messages, hWnd, 0, 0))
    {
        TranslateMessage(&messages);
        DispatchMessage(&messages);
    }
    return messages.wParam;
}
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    hDC2 = GetDC(btn);
    HBRUSH hBrush = CreateSolidBrush(RGB(0, 255, 0));
    PAINTSTRUCT ps;
    HFONT newFont, oldFont;
    switch (message)
    {
    case WM_CTLCOLORBTN:
    {
                           if (hBrush != NULL)
                           {
                               SetBkColor(hDC2, RGB(0, 255, 0));
                               return (BOOL)hBrush;
                           }
    }
        case WM_PAINT:
            hDC = BeginPaint(hWnd, &ps);
            newFont = CreateFont(30, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL);
            oldFont = (HFONT)SelectObject(hDC, newFont);
            TextOut(hDC, 350, 50, "Welcome To The Game", 19);
            EndPaint(hWnd, &ps);
        break;
        default:
        return DefWindowProc(hwnd, message, wParam, lParam);
        break;
    }
    return 0;
}