Author |
Topic: Transparent that ain't (Read 741 times) |
|
KenDown
Full Member
member is offline
Posts: 181
|
 |
Transparent that ain't
« Thread started on: May 30th, 2015, 7:32pm » |
|
I've written a simple program that sets a transparent window over the top of the screen. You can draw on this transparent window to enhance or highlight whatever is on the screen beneath it - a PowerPoint presentation, for example. You have to declare one colour to be the transparent colour, which I set to be COLOUR1 - dark red.
The problem is that when I use SCREENSAVE to save the screen the transparent window is no longer transparent but comes out as a dark red rectangle - with whatever I have draw or scribbled on it, but whatever was underneath is, of course, not visible.
Anyone know a way of keeping the transparent window transparent?
|
|
 Logged
|
|
|
|
KenDown
Full Member
member is offline
Posts: 181
|
|
Re: Transparent that ain't
« Reply #2 on: May 31st, 2015, 05:20am » |
|
No, I haven't. The problem isn't that I want to include a dialog box or any of the other things those procedures are supposed to deal with, but I can certainly try methods two and four (I don't particularly want the mouse pointer, as in method three).
Curiously, when I tried PrtScr I got the underlying screen but not what I had scribbled on top of it, yet when my son tried it, it all worked perfectly. I can only assume that PrtScr works differently in XP (which I am still using) and 8.1, which is what he has.
|
|
Logged
|
|
|
|
rtr2
Guest
|
|
Re: Transparent that ain't
« Reply #3 on: May 31st, 2015, 07:03am » |
|
on May 31st, 2015, 05:20am, KenDown wrote:| No, I haven't. The problem isn't that I want to include a dialog box or any of the other things those procedures are supposed to deal with |
|
What they are "supposed" to deal with is unimportant; they are window capture routines that may solve your problem. Try them anyway.
Quote:| I can only assume that PrtScr works differently in XP (which I am still using) and 8.1 |
|
That's possible. DWM introduces an extra 'layer' of buffering between an application and the screen which can introduce incompatibilities. For example my 'magnifier' application does not - and cannot be made to - run in Windows 8/8.1 
Sadly if PrtScr fails in XP then any method you try may fail too. Another nail in the coffin for that OS.
Richard.
|
|
Logged
|
|
|
|
|
