DDk/WDM Screen Capture

[Alexander Prado]

Hi There!

I need is a virtual driver for capturing desktop window (applications
must see it as a webcam).

As I did not find any free drive for doing that, I am trying to develop
one...
I installed DDK and realized that TESTCAP (DDK ´s sample) has all I
need - except that this driver doesn't capture anything (it only shows color
bars). So, I thought that all I would have to do was to change the core
function "ImageSynth" (in capxfer.c), including a screen capture method and
to make some simple changes...

I tryed GDI for capturing the screen, and likely that's
the problem. In order to debug, I commented all the code in
"ImageSynth", except the following commands, but I have no success (the
driver is successfully compiled and installed, but Windows shows a message
"Windows cannot load the device driver for this hardware. The driver may be
corrupted or missing. (Code 39)".

void ImageSynth (
IN OUT PHW_STREAM_REQUEST_BLOCK pSrb,
IN ImageXferCommands Command,
IN BOOL FlipHorizontal
)
{
// IF THE FOLLOWING COMMANDS ARE COMMENTED, DRIVER WORKS FINE!
HDC hdcScreen;
hdcScreen = CreateDC("DISPLAY", NULL, NULL, NULL);
DeleteDC(hdcScreen);
}


Does anybody could help me? What I need to do?

Thanks in advance.


Alex

 

[ilja78]

Hi There!

I need is a virtual driver for capturing desktop window
(applications
must see it as a webcam).

As I did not find any free drive for doing that, I am trying
to develop
one...
I installed DDK and realized that TESTCAP (DDK ´s sample) has
all I
need - except that this driver doesn't capture anything (it
only shows color
bars). So, I thought that all I would have to do was to change
the core
function "ImageSynth" (in capxfer.c), including a screen
capture method and
to make some simple changes...

I tryed GDI for capturing the screen, and likely that's
the problem. In order to debug, I commented all the code in
"ImageSynth", except the following commands, but I have no
success (the
driver is successfully compiled and installed, but Windows
shows a message
"Windows cannot load the device driver for this hardware. The
driver may be
corrupted or missing. (Code 39)".

void ImageSynth (
IN OUT PHW_STREAM_REQUEST_BLOCK pSrb,
IN ImageXferCommands Command,
IN BOOL FlipHorizontal
)
{
// IF THE FOLLOWING COMMANDS ARE COMMENTED, DRIVER WORKS FINE!
HDC hdcScreen;
hdcScreen = CreateDC("DISPLAY", NULL, NULL, NULL);
DeleteDC(hdcScreen);
}


Does anybody could help me? What I need to do?

Thanks in advance.


Alex

try to use SoftCam application. It includes Virtual Wecam driver and
screen capture utility. If this one don’t suit u needs I know some
alternatives also. I see u tried to develop WDM driver by your self ,
would be nice if u will share u experience.

 

[joshetei]

try to use SoftCam application. It includes Virtual Wecam
driver and screen capture utility. If this one don't suit u
needs I know some alternatives also. I see u tried to develop
WDM driver by your self , would be nice if u will share u
experience.

Hello,

I’m trying to do quite the same as you and also have some problems.
Maybe we could share some code so we can come to an sollution?

Tom

 

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