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#Windows api copyimage how to#
How to create pattern brush from bitmap or picture object ? How to create memory DC and bitmap using CreateCompatibleDC and CreateCompatibleBitmap API? Load, Modify and Save 1, 4, 8, 15 (Bit-fields), 16, 24 and 32-bit Bitmaps using GDI Apis. How to load bitmap data into array from file to perform image operation? How to load BMP file into memory and perform rotation on it ? Working with AVI Files - Part 3 (Working With Frames, AVI to BMP) Tiling Bitmaps into Controls, Forms and MDI Form backgroundsĬreating a new GDI Bitmap from a VB Picture or DCĬreate a VB Picture from a GDI Picture HandleĬopy the entire contents of a PictureBox to the clipboardĬreate a mask image (all black for the transparent colour otherwise white) from a bitmap RotateBitmap - Rotate a 256-color bitmap by any angle GetScreenSnapshot - Capture a window or the entire screen ' IMAGE_BITMAP, thumbwid, thumbhgt, LR_MONOCHROME)īitBlt Picture2.hdc, 0, 0, thumbwid, thumbhgt, hDcNew, 0, 0, vbSrcCopy
'hBmpNew = CopyImage(LoadPicture(Text1), _ '//or Directly Load resized image from the file IMAGE_BITMAP, thumbwid, thumbhgt, LR_MONOCHROME) '// CopyImage returns handle to resized bitmap '//Resize image to exact same size of destination picturebox Picture1.Height = ScaleY()ĭim hDcNew, hBmpNew As Long, hBmpOld As Long Private Declare Function BitBlt Lib "gdi32" ( _īyVal hDestDC As Long, ByVal x As Long, ByVal y As Long, _īyVal nWidth As Long, ByVal nHeight As Long, _īyVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, _ Private Declare Function DeleteDC Lib "gdi32" ( _ Private Declare Function DeleteObject Lib "gdi32" ( _ Private Declare Function SelectObject Lib "gdi32" ( _īyVal hdc As Long, ByVal hObject As Long) As Long Private Declare Function CreateCompatibleDC Lib "gdi32" ( _ Private Declare Function CopyImage Lib "user32" ( _ Place two picturebox controls and two command buttons CopyImage can create a new resized monochrome bitmap using single API call. Win32API.In some situation you can find CopyImage API very useful. do we have a valid rect for this window if (Win32API.IsWindowVisible(hWnd) & get the biggest visible window in the current proc IntPtr MaxHWnd = IntPtr.Zero New Win32API.EnumThreadDelegate(EnumThreadCallback), ListHandle = GCHandle.Alloc(_windowHandles) įoreach (ProcessThread pt in proc.Threads) the mainFrame is size = 0, so we look for the 'real' window RECT MaxRect = default(RECT) // init with 0 if (IsValidUIWnd(proc.MainWindowHandle)) ( " Can't add a process with no MainFrame")
#Windows api copyimage code#
To do that, we would check for a visible window that has the largest rectangle in each thread within a process.Ĭopy Code internal UIApp( proc) That would work 90% of the time, but still there are applications like Toad for Oracle that have the mainframe window hidden, so we have to look for the 'real' window to capture. Another more convenient way would be to get the mainframe Window handles of the UI applications running on the local machine. The FindWindow button would always get the handle based on the parameters you type.
#Windows api copyimage windows#
But knowing this information might require Spy++, and even then you can have multiple Windows with the same parameters.
If you knew the caption and/or the class name of the window you are looking for, then getting the window handle is trivial using the FindWindow native win32 API. The site is extremely helpful for such a task. There isn't much help in the FCL, so I had to import a lot of native calls. In order to capture a window you would need to get its handle and make use of the native win32 API calls to the bitmap handle that would be used by the managed code. Hence I've created this C# application that allows capturing the specified Window and persisting it in a supported format file type. There are some articles about how to do it like Lim Bio Liong's article, but it uses old unmanaged C++ code, or it comes short when the target window is falling outside the desktop boundary. Sometimes you might need to take snapshots of some Windows for a presentation or for a monitoring task.
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