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PaulLaidler · Posted: Thu Apr 01, 2021 12:24 pm Post subject:

Here is the latest update on this subject. There is an undocumented function called grab_desktop_dib@ that avoids the need to use the clipboard. It works for 32 bits but not for 64 bits at the moment.

PaulLaidler · Posted: Thu Apr 01, 2021 2:33 pm Post subject:

ClearWin+ has now been fixed so that the above sample will work for 64 bits as well as for 32 bits. Updated DLLs are available on request for users of v8.70.

DanRRight · Posted: Fri Apr 02, 2021 12:25 pm Post subject:

Looks interesting. One question: is it possible with this method to save just the selected portion of the entire screen ? PrintScreen button started to offer recently such capability: you hit the PrintScreen and the monitor screen gets grayed and offer you to select the region to save

wahorger · Joined: 13 Oct 2014 Posts: 1257 Location: Morrison, CO, USA

As far as grabbing the entire desktop, I think this is a great functionality to have, but does not satisfy the requirement that I have imposed so that I can grab a window and not have to select it (using the Windows snapshot function) or edit it (as I would for a full desktop grab). It is a function of convenience. Keystroke: done and saved.

One could debate that the ability to grab a window programmatically by the user does take control of the clipboard and changes the contents, but if you already would have done it anyway using a Windows Snapshot or Alt+PrntScrn, there is no additional harm done by doing this programmatically.

I have seen (MSDN documentation) that it is possible to dig deep into device contexts in Windows to grab video memory that shows the current window, but it exceeds both my expertise and willingness to invest time.

PaulLaidler · Posted: Sat Apr 03, 2021 5:31 pm Post subject:

Bill

I have added a routine that exports an image of a given window and I will provide details shortly (probably Monday).

wahorger · Joined: 13 Oct 2014 Posts: 1257 Location: Morrison, CO, USA

Awesome, Paul! Looking forward to giving it a try!

DanRRight · Posted: Sat Apr 03, 2021 8:29 pm Post subject:

I use for videorecording nice program called Snaggit (right now it does not matter if this program is good or bad and it is not about making videorecording functionality) and what it doing really handy is that after you start it - it offers you to select one of many your open windows with mouse by highlighting each window when you move your mouse over the screen. As soon as you click on the window you want, it grabs the position of the window and the video recording starts. Same actions are for the photo recording. Same windows selection functionality with Clearwin would be great. You can then grab series if still images of specific window during the program run and later user with different software could make a movies out of them. This Clearwin function would ask you to select the window you want and then all next times it will be called it will use this selection without asking

PaulLaidler · Posted: Mon Apr 05, 2021 4:08 pm Post subject:

Bill

Here is a sample program that illustrates what you will be able to do with the updated ClearWin+....

PaulLaidler · Posted: Mon Apr 05, 2021 4:18 pm Post subject:

Dan

Your request posed an interesting challenge. The following program illustrates what will be possible with an updated ClearWin+. It presents a symbol. When you drag this symbol and drop it over a window then an image of that window is copied to the speciified file.

wahorger · Joined: 13 Oct 2014 Posts: 1257 Location: Morrison, CO, USA

Paul, this would be perfect for me.

Thanks, I shall await the updated Clearwin+!

Bill

DanRRight · Posted: Mon Apr 05, 2021 10:19 pm Post subject:

Thanks Paul,
please inform when the DLLs will be ready, right now these functions are missing

WINDOWATCURSOR#
EXPORT_WINDOW_IMAGE
LOADRESOURCE

PaulLaidler · Posted: Tue Apr 06, 2021 12:39 pm Post subject:

New DLLs and (in a separate download) new INCLUDE files are available here http://forums.silverfrost.com/viewtopic.php?t=4245. Only use the downloads for today (April 6 2021).

A revised sample program with resources can be downloaded from https://www.dropbox.com/s/c6azqvjmkczcp8q/capture.zip?dl=0.

p.s. At the moment the sample only works for 64 bits.

PaulLaidler · Posted: Tue Apr 06, 2021 1:49 pm Post subject:

I have now updated the downloads for the DLLs and INCLUDE files so that the sample program now works for 32 bits as well as 64 bits.

In the sample program it is necessary to call GetCursorPos@ rather than GetCursorPos. This is the call that was failing for 32 bits.

DanRRight · Posted: Wed Apr 07, 2021 2:34 am Post subject:

Paul,
The size of saved are is a bit larger than the actual window size. Do you see the same ?

PaulLaidler · Posted: Wed Apr 07, 2021 9:04 am Post subject:

Dan

Yes. I noticed that but I don't know how to easily get the exact size. I have used GetWindowRect and even allowed for the width of the borders. Hopefully it can be tollerated.