I am using Webbrowser control to automate the data entry but there is a file upload control for which i am unable to upload file.
The code of target page is :

<

form name="iform" style="margin:0px;" action="http://test.com" method="post" enctype="multipart/form-data">

<INPUT TYPE="button" value="Change Image" style="width:112px;">

<input id="file" name="image" type=file class=hiddenMask onchange="upload();" this.edit="false">

I am trying to click the change image button but its not getting clicked.

Please assist on uploading the file automatically.