An Example for using dll in Tally. Please read before using this add on. I do not provide any warenty for this addon. this is for academic purpose only. You are free to use , modify at you own risk. Steps to activate this TDL. 1. Copy file to C:\Windows\System32 2. Open Cmd in administrator Mode (Elavated mode) 3. CD C:\Windows\Microsoft.NET\Framework64\v4.0.30319 4. Type without quote "regasm BrowseFolder.dll /codebase" The Source code I have used for creating dll can be found txt file along with TDL code.