Answer / suyambu

UpdateData function is used to get or set the values in
your appropriate control variables. UpdateData ( FALSE )
would update the data from control variables to control,
while UpdateData ( TRUE ) would assing the data from
controls to control variable.

This function need not be called if you are using DDX (
Dynamic Data Exchange ).

Answer / manish

UpdateData() by default it has argument "TRUE": UpdateData
(TRUE)This Function is used in Do data exchange. UpdateData
(TRUE) transfer the control value to a variable .
UpdateData(FALSE) transfer the variable value to control to
display at presentation layer.

Answer / praveen

All 3 are correct. answer #2 is an abstract.

Answer / suman

answer #2 is different from 1 & 3
which is correct?

Answer / rainz

The use of this function is to initialize data in a dialog box, or to retrieve and valid the same data.
Before the dialog is visible, the UpdateData (bSaveAndValidate) ,has bSaveAndValidate set as False(dialog initialization),but as soon as the "OK" button code gets executed "bSaveAndValidate" is set to true.(data retrieval)

Answer / suresh

UpdateData(): By default the parameter is FALSE; Which means
it is transfering the variables to controls;
UpdateData(TRUE): data Flowing from controls to varibles;

Answer / arvin

BOOL UpdateData( BOOL bSaveAndValidate = TRUE );

UpdateData(TRUE) indicate dialog box is being initialized
UpdateData(FALSE) indicates data is being retrieved from the
dialog box.

Call this member function to initialize data in a dialog
box, or to retrieve and validate dialog data.

what do you mean by psychic window?

2 Answers   Patni,

What interface must be supported by an ActiveX control?

2 Answers  

19)how to set Back Ground Picture to a Dialog Box in MFC ?

1 Answers  

Do you have an idea about MFC?

0 Answers   C DAC, CDAC,

Whats is DDX & DDV in MFC?

1 Answers   HCL,

What types of threads are supported by MFC framework?

2 Answers  

1) How do you Destroy a Dialog Box ?

2 Answers   Honeywell,

what is the size of a process

2 Answers   E Logic, IBM,

how do u identify RTTI in vc++

4 Answers   Siemens,

What is model and modeless dialog box ? Give some examples?

2 Answers   Mphasis,

How you create a button dynamically?

2 Answers  

What is thread & process?

15 Answers   Exaband,