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.

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