install a windows file

I am producing a program that needs certain files from Windows to be installed.  I have worked out how to check if the file is on the hdd and in the right place but what i need to do is have windows install a file from the CD if i find it missing.

anyone know how to get this done?
mantra246Asked:
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RickHalleConnect With a Mentor Commented:
Your best bet is to look at the Windows Installer SDK. It has information regarding installations. In particular look for "Install on demand".

http://msdn.microsoft.com/downloads/default.asp?URL=/code/sample.asp?url=/MSDN-FILES/027/001/457/msdncompositedoc.xml

Rick Halle
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urosvCommented:
You need program like installShield... If you have Delphi CD you can find InstallShield Delphi edition on that CD. The installer will install all necessary files to your destination computer.
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mantra246Author Commented:
Thanks Urosy, but i need to be able to install a file from the Window CD once my program has been installed and checks to see if the needed file is there.

example:  Imagine i wanted to ensure the user had notepad.exe installed before i let my program open a txt file.  If the program found that it did not exist on the system then it would install it from the Window CD.  Same if it found a DLL file missing from the Windows folder, the program would re-install it from the Windows CD.

I am sure there must be a call somewhere (or small peice of code) to get windows to do it - i just can't figure out how.

Any ideas on how to do it?
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GwenaCommented:
listening :-)
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