Hi Albert.

#1 how do I retrieve a this kind of datawindow compared to the regular datawindow?

There are several ways:

You can specify retrieval arguments for the composite datawindow. (its in the properties page) You can specify the defined arguments as retrieval arguments for the nested datawindows. Retrieve the datawindow as normal datawindows.

Another way is to fill the nested datawindows by script. Use this if you need more control about this process. Use the GetChild fuction to get the datawindow child for a (each) nested datawindow. With this child you can do what you want: retrieve, copy data, share data, insert rows, change data, ... (see #3)

#2 if one of datawindow within the composite style datawindow was NOT fit in the size of width ,how do I deal with this kind of issue?

The width of the nested datawindow in the composite datawindow should be big enough. If not the data will clipped. You could change the width at runtime (Modify statement).

#3 how do I add some recrods in a datawindow which is grid style  within the composite style datawindow?

Use GetChild funtion to get the Datawindow child for the nested datawindow. With this child you can almost work like with a datawindow control.

DataWindowChild ldwc_child

dw_comp.GetChild ("dw_nested", ldwc_child)  // "dw_nested" is the name of the object in the composite datawindow that holds your nested datawindow
ldwc_child.InsertRow(1)
...

HTH,

René