How to pass Structures

[girls3dog1]

Can Structure objects only be passed window to window via openwithparm and then extract data contained within with the Message object? Can I simply declare and create an instance of the structure in another window and then proceed to extract data from it without using the Message object?

 

[BetterLateThanNever]

Hi,

You are better off creating a non-visual to mimic the structure i.e. using public instance variables. You can then pass the non-visual as an argument in message.powerobjectparm and cast into another variable of the same type as the non-visual:

n_cst_example lnv_example

lnv_example.is_examplestring = "Hello"
lnv_example.il_examplelong = 42

OpenWithParm(w_r_response, lnv_example)

then in the open event (or pfc_preopen event) of w_r_response

n_cst_example lnv_receivingvariable // note: same type

lnv_receivingvariable = message.powerobjectparm

MessageBox("Example String", lnv_receivingvariable.is_examplestring)

MessageBox("Example Long", String(lnv_receivingvariable.is_examplelong))

One of the advantages of using a non-visual as your structure is that you are able to take advantage of inheritance.

Cheers.

 

[BetterLateThanNever]

Oops, that should read

MessageBox("Example Long", String(lnv_receivingvariable.il_examplelong))

Cheers.

 

[884813]

If diffrent windows need to pass datas,they must use message or other global objects/variables.