Transparent rectangle drawn on top of lines MFC on Windows CE 5.0

I would like to draw a transparent color filled rectangle on some static lines. The width of this rectangle changes in real time. How do I accomplish this? The background color is white.

Thank you in advance.
LVL 8
Anthony2000Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

alexey_gusevCommented:
do you mean like DrawFocusRect() or DrawEdge() Win32 API?

otherwise there is Rectangle() function which uses current pen to draw the frame and current brush to fill it.

moreover, you can SetBkMode() to transparent
0
Anthony2000Author Commented:
What I need is a snippet of code, can you supply one? Here is what I have tried:


	brushFill.DeleteObject();
	brushFill.CreateSolidBrush(m_colorNeedle) ;
 
	pDC->SetBkMode(TRANSPARENT);
	pBrushOld = pDC->SelectObject(&brushFill) ;
 
	// draw the rectangle
	pDC->Polygon(m_pointRectangle, 5) ;
 
	// restore the brush (but keep the pen!)
	pDC->SelectObject(pBrushOld) ;

Open in new window

0
Anthony2000Author Commented:
Also, I am developing using Visual Studio 6.0, but it will need to work on Windows CE using eVC++ 4.0. Thanks for your help.
0
Learn SQL Server Core 2016

This course will introduce you to SQL Server Core 2016, as well as teach you about SSMS, data tools, installation, server configuration, using Management Studio, and writing and executing queries.

alexey_gusevCommented:
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Anthony2000Author Commented:
Well, those functions will draw the rectangle, but what about filling it with a transparent color? How do I accomplish that? Thanks again for your help.
0
alexey_gusevCommented:
that do you exactly mean by "transparent colour" ? could you please explain it in more details?
0
Anthony2000Author Commented:
Lets say that I have a picture box with text in it. I want to fill in part of the rectangle with a color. So, that part of the text has a blue background  and the rest has a white background. I just wanted to avoid re-drawing the text. Does this help?
0
Anthony2000Author Commented:
Like a progress control.
0
alexey_gusevCommented:
well, if you change any part of the area then it will be Invalidate()'ed, so you'll get WM_PAINT eventually. thus you'd definitely have to redraw the text somehow. what you could do is to draw the text transparently, so it doesn't matter that's the background.
0
Anthony2000Author Commented:
I appreciate your help!!
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Smartphone Programming

From novice to tech pro — start learning today.