Googling around it’s easy to find more samples with a similar code. The DX9IFRSimpleHWEncodeĬaptures a renders target, compresses it, and write it to a video file. The DX9/DX10/DX11/GL IFR SimpleSample targets DirectX 9, 10, 11, and OpenGL to capture and render target to a file. There is also an accompanying document called NVIDIA Capture Sdk Sample Descriptions that introduces samples that utilize NVIDIA SDK to do some screen/video capture work.įor instance, NvFBCToSys demonstrates how to use the NvFBCToSys interface to copy the desktop into a system memory buffer and save it as a file.

It describes a set of functions that help to capture screen/video snapshots using a NVIDIA helper library called NVFBC (or NVFBC64 on 64-bit systems). While poking around NVIDIA files I came across a very intriguing document NVIDIA Capture SDK Programming Guide. Now, it turns out that the very same functionality can be programmed via existing and pretty convenient wrapper libraries that are offered by some of the GFX card vendors.

There are plenty of code examples online that demonstrate how to do it. It may also use GDI+ to save screenshots as JPEG, GIF, PNG, etc. Traditional screen grabbing malware uses a bunch of GDI APIs: CreateDC, CreateCompatibleDC, CreateCompatibleBitmap, BitBlt.

Nvfbc capture