DrawText изменение текста

// Obtain the window's client rectangle
GetClientRect(hwnd, &r);

// THE FIX: by setting the background mode
// to transparent, the region is the text itself
// SetBkMode(hdc, TRANSPARENT);

// Bracket begin a path
BeginPath(hdc);

// Send some text out into the world
TCHAR text[ ] = "Defenestration can be hazardous";
TextOut(hdc,r.left,r.top,text, ARRAYSIZE(text));

// Bracket end a path
EndPath(hdc);

// Derive a region from that path
SelectClipPath(hdc, RGN_AND);

// This generates the same result as SelectClipPath()
// SelectClipRgn(hdc, PathToRegion(hdc));

// Fill the region with grayness
FillRect(hdc, &r, GetStockObject(GRAY_BRUSH));

RECT rc;
GetClientRect(hWndButton,&rc);
FillRect(GetDC(hWndButton),&rc,CreateSolidBrush(RGB(28,245,16)));
int TransparentMode = SetBkMode(GetDC(hWndButton), TRANSPARENT);
DrawText(GetDC(hWndButton),"Exit",-1,&rc,DT_CENTER | DT_NOCLIP | DT_SINGLELINE);
SetBkMode(GetDC(hWndButton), TransparentMode);
ReleaseDC(hWndButton,GetDC(hWndButton));

bool InButton;

LONG_PTR CALLBACK Timer(HWND hWnd,UINT uMsg, UINT idTimer, DWORD dwTime)
{
    switch(uMsg)
    {
    case WM_TIMER:
        POINT    point;
        HWND hTWnd;
        GetCursorPos(&point);
        hTWnd = WindowFromPoint(point);

        if(hTWnd != hWndButton)
            InButton=false;

        if (!InButton)
        {
            if(hTWnd == hWndButton)
            {
                InButton=true;
                FILE *stream;
                fopen_s(&stream, "VSLog.log", "at");
                fseek(stream,0L,SEEK_END);
                fprintf(stream,"Have MouseMoveToButton \n");
                fclose(stream);
            }
        }

        break;
    }
    return FALSE;
}

void OnMouseLeave(HWND hWnd, int x, int y, UINT uMsg)
{
    SetTimer(g_hWnd,1,100,(TIMERPROC)Timer);
}