Can someone tell how to send invoice n in pdf to Whatsapp

Someone post this but this is not working

Code:
[#Form: Sales Color]
Add : Button : WhatsApp
On: Form Accept: $$InAlterMode: CALL: SALES Export Report
On: Form Accept: $$InCreateMode: CALL: SALES Export Report
On : Form Accept: @@IsSales : CALL : onformaccept

[Button: WhatsApp]
Option : SalesjayA : $$IsSales:##SVVoucherType

[!Button: SalesjayA]
Key : Alt + W
Action : Browse URL : "http://web.whatsapp.com/send/?Phone=" + @@mobileno+ +"&text=" + @@Linemsg + @@SVPrintFileName


[Functionnformaccept]
10 : QUERYBOX : "Whatsapp To Customer For Invoice Details ?" : Yes:No
20 : IF : $$LastResult
30 : CALL : whatsappstring
40 : ENDIF

[Function: whatsappstring]
00 : Browse URL : "http://web.whatsapp.com/send?Phone=" + @@mobileno+ +"&text=" + @@Linemsg + @@SVPrintFileName


[Function: SALES Export Report]
20: Set: SVExportFormat : $$SysNameDF
30: Set: SVPrintFileName: $$String:$PartyLedgerName + "_" + $$String:$vouchernumber + "_" + $$String:$Vouchertypename
40: Set: SVPrintFileName: $$MakeExportName:##SVPrintFileName:##SVExportFormat
50: Set: SVOpenFileAfterExport: No
60: Export Report:. : TRUE
80: Set: SVExportFormat: $$IsSysNameEqual:English:#DSPExportLanguage

[System: UDF]
SVPrintFileName : Logical : 1600