invoke manually button click event in c++ builder -

using c++ builder borland (bcb6).

i wish invoke manually button click event. did:

fmap->bbdoneinclick(null);

while done button located on fmap form, went wrong that.

do need call bbdoneinclick different parameters , not null ?

instead of null use form1 or bbdone ...

it depends on event code how uses sender parameter
also can call event handler safely if form created
if not access canvas can use in tform1::tform1 constructor
if need take care of not using prior onshow or onactivate
to avoid vcl problems or app crashes
for common handlers sufficient use main window ... (i use this instead of null)
if have single handler multiple components deciding operation or target sender parameter in case need pass pointer component itself

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