Check size file upload by asp.net

If MyUpload.PostedFile.ContentLength > 3500000 then
lblMessage.Text = "File size cannot exceed 3.5 mb limit"
End If

Open multiple yahoo messengers and use different IDs

1. Click START
2. choose RUN
3. Type regedit
4. click OK or press enter
5. When the registry window appears, click the following on the registry tree (left side):

    First: HKEY_CURRENT_USER
    then: Software
    then: yahoo
    then: pager
    then: Test

6. Go to the right side of the screen (under Default) then press the right button on your mouse (right click)
7. Choose DWORD value (press enter)
8. Rename it as Plural (capital P) (press enter)
9. Double click on Pural then put 1 as a value data. (Press enter)
10. Close the registry window

DONE!