VBScript or JScript functions defined in the macro module of a QlikView document can be called from the script. If a function called is not recognized as a standard script function, a check will be made to see if a custom functions resides in the module. This gives you a large degree of freedom to define your own functions. Using custom macro functions will of course be somewhat slower than executing the standard functions.
rem *************************************************
rem ***THIS IS VBSCRIPT CODE FROM THE MODULE*********
rem**************************************************
rem ********* Global variables ********************
dim flag
rem *******functions accessible from script *********
rem ************ wrap for input box ******************
function VBin(prompt)
VBin=inputbox(prompt)
end function
rem ************ clear global flag ******************
function VBclearFlag()
flag=0
end function
rem ********* test if reference has passed ***********
function VBrelPos(Ref, Current)
if Ref=Current then
VBRelPos="Reference"
flag=1
elseif flag=0 then
VBRelPos="Before "&Ref&" in table"
else
VBRelPos="After "&Ref&" in table"
end if
end function
// **************************************************
// *************THIS IS THE SCRIPT *****************
// *************************************************
let MaxPop=VBin('Max population in millions :');
// Ask limit
let RefCountry=VBin('Reference country :');
// Ask ref.
let dummy=VBclearFlag(); // Clears the global flag
Load
Country,recno(),
Capital,
"Area(km.sq)",
"Population(mio)",
VBrelPos('$(RefCountry)',Country)
as RelativePos
from country1.csv
(ansi, txt, delimiter is ',', embedded labels)
where "Population(mio)" <= $(MaxPop);
Transfer of Parameters
The following rules apply for parameter transfer of parameters between the load script and VBScript:
- Missing parameters are passed as NULL.
- If the actual expression evaluates to a valid number, the number is passed, else if the actual expression evaluates to a valid string, the string is passed, else NULL is passed.
- NULL is passed as VT_EMPTY.
- Return values are treated in a natural way.
