Associating file extensions with programs

[Pyramus]

How do you go about setting which program runs a particular file extension? So for example, I want program.exe to launch whenever a file with extension .ext is run. Is this info in the registry somewhere?

 

[srfink]

You could set the program that is associated with a particular file extension in the folder options menu item of the windows explorer, if that is what you mean.
srfink

 

[Pyramus]

Given that I'm posting in the C++ forum, I'm quite obviously looking for a programatic explanation.

 

[srfink]

OK. Here's an example of how you could do it programatically:
// The following code snippet sets the file program
// that is associated with the cnf extension to WORDPAD
char szProductType[80];
DWORD dwBufLen;
HKEY hTestKey = NULL;
LONG lResult = ::RegOpenKeyEx(HKEY_CURRENT_USER,
"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\.cnf\\OpenWithList", 0,
KEY_ALL_ACCESS, &hTestKey);
if ((ERROR_SUCCESS == lResult) && (hTestKey != NULL))
{
strcpy(szProductType,"WORDPAD.exe"
lResult = RegSetValueEx(hTestKey, "a", NULL, REG_SZ, (LPBYTE) szProductType, dwBufLen);
RegCloseKey(hTestKey);
}
Hows this?

Steve

 

[Pyramus]

This looks useful, thanks.