Allow uninstall ONLY if... - Custom Actions

dtieuf

Full Members
31 posts

Posted 03 May 2005 - 22:45

Hi all,

Supposing I am installing A.msi and B.msi in this order through a custom bootstrapper...
A and B have distinct package/product/upgrade codes.

I would like the uninstall process to be in a specific order as well, meaning:
if users launch A's uninstall, detect B, if B is still installed, don't uninstall A.

I have tried using RegLocator with B's upgrade code but that table doesn't work with registry keys (only values).

I have tried an entry in A's upgrade table with msidbUpgradeAttributesOnlyDetect and a CA type 19 after FindRelatedProducts, it's still being able to uninstall.

Any thoughts ?

Thank you,

Sophie

luke_s

Full Members
532 posts

Posted 04 May 2005 - 00:12

You should be able to find B's upgrade code in the registry, or some other unique key for B in the registry, and set this to a property.

You can then add this to A's logic and pop up an error when this property is set.

_nick_

Members
34 posts

Posted 04 May 2005 - 14:00

You want to call MsiQueryProductState with the the product code of B in A's uninstall.

http://msdn.microsof...roductstate.asp

Make it an uninstall action and check for a return of INSTALLSTATE_DEFAULT.

CODE

INSTALLSTATE eState;

eState = MsiQueryProductState( szProductCode );

switch(eState) {
case INSTALLSTATE_ABSENT:
case INSTALLSTATE_ADVERTISED:
case INSTALLSTATE_UNKNOWN:
// Product is advertised or not installed, proceed
return S_OK;

case INSTALLSTATE_DEFAULT:
// Product is still installed
return E_FAIL;

case INSTALLSTATE_INVALIDARG:
// malformed product code
ASSERT(FALSE);
return E_FAIL;
}