title: deal WM_PAINT event for Tab Control also need to draw the items manually?
body: <p>I created a tab control and several tab items on it. I want my tab control (the region where no items ) background have a good appearence. So I used GradientFill to draw the tab control. But doing this, the tab items are disappeared. This is not the same situation for parent-child window. So am I supposed to draw the tab items also if I want to change the background of the tab control?</p>
  
  <p>Here is the code:</p>
  
  <pre><code>switch(message) {
      case WM_PAINT:
          HDC hdc;
          PAINTSTRUCT ps;
          RECT rectTabControl;
  
          hdc = BeginPaint(hwnd, &amp;ps);
  
          GetClientRect(hwnd, &amp;rectTabControl);
  
          TRIVERTEX        vert[2] ;
          GRADIENT_RECT    gRect;
  
          vert [0] .x      = 0;
          vert [0] .y      = 0;
          vert [0] .Red    = 0x1000;
          vert [0] .Green  = 0x0000;
          vert [0] .Blue   = 0x0000;
          vert [0] .Alpha  = 0x0000;
  
          vert [1] .x      = rectTabControl.right;
          vert [1] .y      = rectTabControl.bottom; 
          vert [1] .Red    = 0xff00;
          vert [1] .Green  = 0x0000;
          vert [1] .Blue   = 0x0000;
          vert [1] .Alpha  = 0x0000;
  
          gRect.UpperLeft  = 0;
          gRect.LowerRight = 1;
  
          GradientFill(hdc,vert,2,&amp;gRect,1,GRADIENT_FILL_RECT_H);
  
          EndPaint(hwnd, &amp;ps);
          return 0;
  }
  </code></pre>