error: expected primary-expression before '=' token

(void)new Q3CheckListItem (ui->view,*it, Q3CheckListItem::Type = Q3CheckListItem::CheckBox );

got this error,
error: expected primary-expression before '=' token

plz help...

You need to assign the result of the code shown to something.

you can't assign something to an enum...

Code:

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Q3CheckListItem::Type = Q3CheckListItem::CheckBox

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Do you mean

Code:

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(void)new Q3CheckListItem (ui->view,*it, Q3CheckListItem::CheckBox );

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You're confusing how you prototype a method with how you actually code it for a call. In the prototype description something like "Q3CheckListItem::Type = Q3CheckListItem::CheckBox" means that that parameter is optional and will take the value "Q3CheckListItem::CheckBox" if you omit it in the call. If you want a different value you'd simply code the value. Eg:

"... someParm, Q3CheckListItem::ShoeBox)"

for the case where one of the enum values from Q3CheckListItem is expected.

And I'm not sure where you got the "(void)".

(And, of course, you shouldn't be using the Q3 stuff.)

The (void) explicitly discards the returned pointer from the call to new, makes it obvious you intended to discard the return value, and avoids a warning from compilers that issue one when you ignore a return. OTOH, if it weren't for QObject's memory management this construct would create a memory leak.