Inno Setup [Code] section variable to [Registry] -


i have problem inno setup.

i'm using resolution detection script in [code] section here:
inno setup: how primary monitor's resolution?

and want put xres , yres values [registry] section of installer looks this.

root: hkcu; subkey: "software\myapp\settings"; flags: uninsdeletekey; valuetype: dword; \     valuename: "screenwidth"; valuedata: "xres" root: hkcu; subkey: "software\myapp\settings"; flags: uninsdeletekey; valuetype: dword; \     valuename: "screenheight"; valuedata: "yres"

i tried method how use pascal variable in inno setup?, can't work. tried solve problem myself many times, give up...

can me , explain how that?
i'm newbie inno setup, , pascal.

one way can writing single scripted constant function both dimensions , passed parameter return either horizontal or vertical resolution. rest upon inno setup engine:

[setup] appname=my program appversion=1.5 defaultdirname={pf}\my program  [registry] ; getresolution function used in following {code:...} scripted constants ; takes parameter x retrieve horizontal resolution, y retrieve vertical root: hkcu; subkey: "software\myapp\settings"; flags: uninsdeletekey; valuetype: dword; \    valuename: "screenwidth"; valuedata: "{code:getresolution|x}" root: hkcu; subkey: "software\myapp\settings"; flags: uninsdeletekey; valuetype: dword; \     valuename: "screenheight"; valuedata: "{code:getresolution|y}" 
[code] function getsystemmetrics(nindex: integer): integer;   external 'getsystemmetrics@user32.dll stdcall';  const   sm_cxscreen = 0;   sm_cyscreen = 1;  function getresolution(param: string): string; begin   // in {code:...} constant function call passing either   // x or y char parameter (here param parameter),   // let's decide dimension return param's first   // char (uppercased allow passing small x , y)   case uppercase(param[1]) of     'x': result := inttostr(getsystemmetrics(sm_cxscreen));     'y': result := inttostr(getsystemmetrics(sm_cyscreen));   end; end;

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