[Closed] Acessing to a SS_BITMAP in a panel managed by a ParamBlock2

I wanna to change the bitmap stored in a frame (SS_BITMAP) this rollout was publishied by an ParamBlockDesc2, since a bitmap can’t be exposed as a kind of control my PBAccessor has not access to that control.

Obviously if I don’t use ParamBlockDesc2 and I create it manually throught AddTabRollupPage I could modify it accesing to it throught GetDlgItem but I prefer to use ParamBlockDesc2 since it is much more confortable to manage all the rest of the properties.

A way to find the HWND could be a first useful step.

Thank you in advance!

PS this post is related but not the same as http://forums.cgsociety.org/showthread.php?f=98&t=1102931 since this one ask for a way to store a bitmap data, not how I could change the bitmap.