3 replies to this topic

[mrouthier]

Good evening Mr the gurus,

I have a DLL that contains a CA.  This DLL will need to call another DLL, which is supplied by a third-party and that I can't modify.

I have tried simply adding the second DLL to the BinaryTable but of course it didn't work; MSI outputs binaries with temporary encoded names (idb?).

What should I do?

Thanks.

[Ian Blake]

You need to use the msi database commands to read the second dll out of the binary table into a temporary location.  You can then call it.

In outline

hDatabase = MsiGetActiveDatabase(hInstaller)

MsiDatabaseOpenView(hDatabase,
  "SELECT * FROM Binary WHERE Name='BinaryName'"
  &hView);

MsiViewExecute(hView, 0);

MsiViewFetch(hView, &hRecord);

Count = MsiRecordDataSize(hRecord,2);

// This is ok for smalll files otherwise we will need to
// iterate.
pBuffer = malloc(Count);

MsiRecordReadString(hRecord,
  2,
  pBuffer,
  &Count);

Now you can write pBuffer out to a file.  Do not forget to close all the handles and add error checking.

Hope this helps

[mrouthier]

Thank you very much, it did the job!

[Ian Blake]

Glad to help.

In case anybody else reads the above.  MsiRecordReadString should be MsiRecordReadStream.

Sorry for any inconvenience that may of caused.