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Hi Zoppo<br />
<br />
Nope, that doesn't work. The rectangle is complely black. <br />
<br />
By the way, the rectangle covers a bitmap. Would that make a difference?<br />
<br />
John
</div>


Hi Zoppo

Nope, that doesn't work. The rectangle is complely black.

By the way, the rectangle covers a bitmap. Would that make a difference?

John

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You could use a combination of MoveTo (moves cursor to a point without drawing a line) and DrawTo (draws line from where the cursor was up to &nbsp;the new point).<br />
<br />
The advantage of this technique is that it copes with any shape not just rectangles.
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You could use a combination of MoveTo (moves cursor to a point without drawing a line) and DrawTo (draws line from where the cursor was up to  the new point).

The advantage of this technique is that it copes with any shape not just rectangles.

<div>
Hiya Zoppo<br />
<br />
Sorry you were right, I didn't use SelectStockObject.<br />
<br />
now that I have it works ok.<br />
<br />
John
</div>


Hiya Zoppo

Sorry you were right, I didn't use SelectStockObject.

now that I have it works ok.

John

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<div class="content wysiwyg-content">
Hiya<br />
<br />
I have an MFC SDI application. In the View I want to draw a rectangle with a black border. However, I want the inside of the rectangle to be empty i.e. transparent. That is, I want to be able to put the rectangle over other shapes in the View and they will appear through the rectangle.<br />
<br />
I have tried it so far using<br />
<br />
pDC-&gt;SetBkMode(TRANSPARENT<wbr />);<br />
pDC-&gt;Rectangle(100,-100,40<wbr />0,-400);<br />
<br />
and nothing covered in the rectangle comes through.<br />
<br />
John
</div>
</div>


Hiya

I have an MFC SDI application. In the View I want to draw a rectangle with a black border. However, I want the inside of the rectangle to be empty i.e. transparent. That is, I want to be able to put the rectangle over other shapes in the View and they will appear through the rectangle.

I have tried it so far using

pDC->SetBkMode(TRANSPARENT);
pDC->Rectangle(100,-100,400,-400);

and nothing covered in the rectangle comes through.

John

How to get a transparent rectangle in a view

Kernel and system programming is the process of creating the software necessary for a computer or device to function and operate other programs. Some operating systems (such as Microsoft Windows) are proprietary, but others, such as the various Linux distributions, are open source.