You can also allocate memory on the hooked process, Notepad in this case, and modify that one then use WM_SETTEXT. I thought about that when I saw his "wait to

You can also allocate memory on the hooked process, Notepad in this case, and modify that one then use WM_SETTEXT. I thought about that when I saw his "wait to fill Notepad with WM_CHAR" which took like 10 seconds? Anyway WM_SETTEXT would be faster then 30 FPS he achieved with accessing Notepad's buffer memory since he's doing a lot of extra-work there to achieve the final result.