How to get URL of downloading file in the desktop application as like the download manger.

Question

i need that, when i download any document or file from any website it should be downloaded in my desktop application that i am trying to develop in c# window application, rather than the default downloader for Internet Explorer, Mozilla FireFox or Chrome.

i found the download manager source code from some website that is being shown in Image1. i want to add the following functionality in that source code that is not becoming possible from my side, that's why i need help regarding how to code the following functionality in the existing source code.

1- when i click on the "Download" button from image2, the pop up window should be auto prompted, as the Internet Download Manager (IDM) does.

2- The Textbox name "Source File" should be auto populated with the URL from where the file is being downloaded.

thanks for helping.