I have one here that I cannot find anything on in my searching.
I am implementing a screen capture functionality into my Visual Basic
..NET application.
The code I am using calls the bitblt function in gdi32.dll to achieve
its magic as follows:
Public Function CreateScreensho t() As Bitmap
Dim Rect As Rectangle = Screen.PrimaryS creen.Bounds
Dim gDest As Graphics
Dim hdcDest, hdcSrc As IntPtr
CreateScreensho t = New Bitmap(Rect.Rig ht, Rect.Bottom)
gDest = gDest.FromImage (CreateScreensh ot)
hdcSrc = GetDC(IntPtr.Ze ro)
hdcDest = gDest.GetHdc
BitBlt(hdcDest, 0, 0, _
Rect.Right, Rect.Bottom, hdcSrc, 0, 0, SRCCOPY)
gDest.ReleaseHd c(hdcDest)
ReleaseDC(IntPt r.Zero, hdcSrc)
End Function
This code works marvelously HOWEVER.....
This screen capture needs to capture my form (which is opaque) ontop
another form.
I have found that when the opacity for the topmost form is set less
than 100 % it does not show up in my capture.
The interesting thing is that a Ctrl-Alt-Print Screen yields the
opaque form in the resulting capture perfectly.
I have some ideas as to why this might be occuring ( gdi functions not
supporting nifty rendering features like opacity being at the top)
Nothing I have come up with at this point (and my skill levels) lead
me to any obvious solutions
I would rather not use Sendkeys and the clipboard as I feel that this
is shoddy at best.
Anybody have any ideas?
Thanks In Advance
Eddie 2 2219
"Eddie Dunn" <ge*****@uncw.e du> schrieb: I am implementing a screen capture functionality into my Visual Basic .NET application.
The code I am using calls the bitblt function in gdi32.dll to achieve its magic as follows: [...] This code works marvelously HOWEVER.....
This screen capture needs to capture my form (which is opaque) ontop another form.
I have found that when the opacity for the topmost form is set less than 100 % it does not show up in my capture.
The interesting thing is that a Ctrl-Alt-Print Screen yields the opaque form in the resulting capture perfectly.
I have some ideas as to why this might be occuring ( gdi functions not supporting nifty rendering features like opacity being at the top)
Nothing I have come up with at this point (and my skill levels) lead me to any obvious solutions
Try this sample:
<URL: http://dotnet.mvps.org/dotnet/sample...nloads/Screens
hot.zip>
--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>
"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at> wrote in message news:<uU******* ******@TK2MSFTN GP10.phx.gbl>.. . "Eddie Dunn" <ge*****@uncw.e du> schrieb: I am implementing a screen capture functionality into my Visual Basic .NET application.
The code I am using calls the bitblt function in gdi32.dll to achieve its magic as follows: [...] This code works marvelously HOWEVER.....
This screen capture needs to capture my form (which is opaque) ontop another form.
I have found that when the opacity for the topmost form is set less than 100 % it does not show up in my capture.
The interesting thing is that a Ctrl-Alt-Print Screen yields the opaque form in the resulting capture perfectly.
I have some ideas as to why this might be occuring ( gdi functions not supporting nifty rendering features like opacity being at the top)
Nothing I have come up with at this point (and my skill levels) lead me to any obvious solutions
Try this sample:
<URL:http://dotnet.mvps.org/dotnet/sample...nloads/Screens hot.zip>
Thanks a million! Works Perfectly This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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i,
I have trying to code a small console app that will
allow a user to select a window and then create a
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Greetings.
I encountered a wield problem when grabing screen images.
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This may be a newbie question, but I can't find the answer anywhere.
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