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Resolved Rendering to a Powerbuilder print job
  1. How-to
  2.  32-bit
  3.  PowerBuilder (Appeon)
  4.  Print
0 Votes
  1. Stuart Macandrew
  2. PowerBuilder
  3. Wednesday, 24 October 2018 08:42 PM UTC

I have an ActiveX control which I need to render to a report. The control has a method which accepts a device context handle. So I think I can do this using the PRP_GetDC() function of PSHR170.DLL, something like this;

 

long ll_printjob

ulong lul_hdc

 

ll_printjob = PrintOpen( "Print Test" )

lul_hdc = PRP_GetDC( ll_printjob )

ole_map.OutputMap( lul_hdc, ... )

PrintClose( ll_printjob )

 

However when I test this, the print-page is rendered blank. 

My declaration of PRP_GetDC() is this;

 FUNCTION ulong PRP_GetDC (long printjob) library "PBSHR170.dll"

 I have attempted to render a bitmap using StretchBlt() to the print page  based on code that I know works, and that also seems to be rendered blank. So at this point I suspect that my hDC value is not valid, or the way I am using it is not valid. However the value  is non-zero, and reasonable values seem to be returned by from calls to get attributes of the hDC using GetDeviceCaps()  e.g.

 

constant long LOGPIXELSX  = 88

long LOGPIXELSY  = 90

GetDeviceCaps( lul_hdc ,LOGPIXELSX)

 

Does anyone have any pointers on getting this working?

(I am using Powerbuilder 2017R3)

Event in the assembly Registry Functions
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