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Can anyone provide me with a sample using CreateHatchBrush

I want to draw a shadow around a sketch in my software. It seems CreateHatchBrush can help, but I don't know how to use it, can someone provide me with a C ++ sample? Many thanks!

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The easiest option is to use GDI + for this. Here's a sample of a quick and dirty rendering of a shadow:

void Render( HDC hdc )
{
    Graphics gr( hdc );
    Image image( L"sample.jpg" );
    const int SHADOW_OFFSET = 7;

    //
    // draw shadow
    //
    SolidBrush shadow( Color( 190, 190, 190 ) );
    Rect rc( 50, 50, image.GetWidth(), image.GetHeight() );
    rc.Offset( SHADOW_OFFSET, SHADOW_OFFSET );
    gr.FillRectangle( &shadow, rc );

    //
    // draw the image
    //
    gr.DrawImage( &image, 50, 50, image.GetWidth(), image.GetHeight() );

    //
    // draw a border
    //
    Pen border( Color( 0, 0, 0 ), 1 );
    rc.Offset( -SHADOW_OFFSET, -SHADOW_OFFSET );
    gr.DrawRectangle( &border, rc );
}


Hope this helps!

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I don't have a sample, but some hints about the general use of brushes on Windows.

CreateHatchBrush()

returns a handle. You must use this handle to make this brush the current brush in the Device Context you are using for rendering. Call the "Device Context" function SetObject

(regular Windows version of GDI):



HDC myDC = GetDC (hWnd); //pass your window handle here or NULL for the entire screen  
HBRUSH hatchBrush = CreateHatchBrush (HS_DIAGCROSS, RGB (255,128,0));  
HBRUSH oldBrush = SelectObject (myDC, hatchBrush);  
//draw something here  
SelectObject (myDC, oldBrush); //restore previous brush  
ReleaseDC (myDC);
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