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Detecting modem installation

Hi,

how can I detect, if the modem is installed?

Thanx.
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Stern
Asked:
Stern
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1 Solution
 
Edo082297Commented:
Hi Stern
   You want to intercepyt an event issued by Windows, WM_DEVICECHANGE, that will notify your program of a change in the hardware configuration. Look up Application.HookMainWindow, and use HookWndProc to receive this message. You will specifically be looking for the DBT_DEVICEARRIVAL message. If you would like me to code this for you, let me know and I will, but you may have enough information to go on.

Regards,
Edo
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Edo082297Commented:
Hi Stern
   I don't think I answered your question properly. To detect if a modem is installed on a machine, open each com port using CreateFile and send "AT"<CR>, and listen for an "OK" response. However, any of these ports with CD high should not be disturbed, as it may be in use (probably by the mouse).

HTH
Edo
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SternAuthor Commented:
Sorry, it's not clear for me. Could you, maybe, give some examples?
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