How to check that file is modified or not using CAPICOM or any solution

[Chetan visodiya]

Hi All, I have developing the windows project. In this project I want to send a pdf file after adding the Digital Signature. and when we retrive same file i check that this file is modofied or not and also check that This file was sended by me or not. how to do this? Adding the Signature is done with CAPICOM but Using CAPICOM we check that file is modified ot not? Please help me. Thanks in advance Chetan Visodiya -- modified at 2:28 Monday 10th July, 2006