[Rd] Using Windows API functions in R
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Jan 26 10:59:05 CET 2007
On Fri, 26 Jan 2007, ????? ??????? wrote:
> Somehow autofilter doesn't allow this message to be posted,
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> -----Original Message-----
> From: Yuri Volchik <volchik2000 at list.ru>
> To: r-devel at r-project.org
> Date: Thu, 25 Jan 2007 22:27:13 +0000
> Subject: Using Windows API functions in R
>> Hi to all.
>> In programming one application i have to "press" button to have
>> application started, which i would like to do automatically from R.
>> To do that i want to use library "user32" function "SendInput"
>> So far i managed to write the following
>> system(shQuote("C:/Program Files/1.exe"),wait=F)
>> system32 <- file.path(Sys.getenv("windir"),"system32")
>> user32 <- file.path(system32,"user32.dll")
You cannot make use of WINAPI calls from .C (or otherwise in R): it is set
up for _cdecl calls only.
You will need to write some wrapper C code.
>> And now i'm at loss how to represent the data structure needed for
>> correct call to that function, may be somebody could help me with
You cannot create C structures using .C, only a few basic array types.
See ?".C" . Since you need wrapper code, you can create the structures
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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