I'm now doing a project, and what I need to do is firstly read a txt file using i/o stream. I've include the lib and since I need to do it in the .NET form (header) and I want to make it such that when I click the button, it will do the file read-in. But I cannot add file declaration such things into the header, as there's no main func there. What should I do? Coz I wanna relate the file read-in to the button. Million thanks!!