SharePoint WebParts (including reporting services integration)

[TjS]

I have a question about the sharepoint webparts.
I would like to connect two webparts to eachother as follows:
if i click the first webpart, the second webpart will show the information

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the regular information of sharepoint doesn't help me very much further, so please advise how i can link two webparts to eachother and how i can manage the one webpart to fill the other.

Thanks in advance for your advise