I want to Pass parameters into crystal report from VB6.
But whatever I try, it don't work Fine,
always Show the message "This field name is not known".

Crystal Report::
Parameter: a.@cmpy;
                   b.@p1
formula:
a. If {?@cmpy} in ["USA","usa"] then
      "This is test 1 sentences"
   else if {?@cmpy} in ["TWD","twd"] then
      "This is test 2 sentences"

b. if trim({?@p1})="1" then "This is test 3 sentences"  

VB::
Public oApp As New CRAXDDRT.Application
Public oRpt As CRAXDDRT.Report
...
oRpt.ParameterFields(1).ClearCurrentValueAndRange
oRpt.ParameterFields(2).ClearCurrentValueAndRange
oRpt.ParameterFields(1).AddCurrentValue ("TWD")
oRpt.ParameterFields(2).AddCurrentValue ("1")  
...

I had trid to use "IsCurrentValueSet" function to check whether parameter was set or not, and It responsed "Ture",so I so confused about it.

Anyone know about this??

ps. I had trid other way that change the formula indirectly, although it can work fine, but it isn't a right way to solve my problem.

Edited by Dean - 21 Jun 2010 at 8:53pm

Thx lockwelle 

Do you mean set the default value of these parameters in report??

I had done that, I set the default value in these two parameters, and there wasn't parameter field in vb code, when i opened crystal report, it also show "This field name is not known"

Because my report put these two Formula(used these two parameters) in detail's section, So i had to pass value into report from vb.


Edited by Dean - 22 Jun 2010 at 5:22am

Edited by Dean - 22 Jun 2010 at 3:50pm