How to call external programs?
I've seen people to call external programs through LabVIEW and was curious to know what functions you could use to do this.
I'm sure that his works using one of the ActiveX or maybe 'open application reference .vi.
Can someone tell me (or show me) a small example of how to open an external program (that is to say, excellent, Notepad, etc.) by programming
HI Cory,.
Take a look using the > examples > communicate with external Applications > ActiveX > Excel > Table write to XL.vi
To take a step back and answer your Q in General.
Required or possible methods to interact with external applications depends on of the external application and that she supported mechanisms.
SysExec
Used for tha programs can be called from a DOS command line.
DCOM
The app was to support this and that you are working with him to of peeks and pokes.
ActiveX
Only available on Windows, methods, and properties that depend on all of the app.
.NET
New version to interact with applications.
Have fun!
Ben
Tags: NI Software
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Hi all
in fact, I am facing difficulties on how to get an external function is called in CVI (Version 2009).
I was delivered with a. H file and a. LIB file to call an external function of my project CVI. The. H file looks like this:
void exportedFunction(double *parameter);
As far as I know, the external function was written with MS Visual C++ 6.
So, I tried to link statically to the al extern like this function:
-Add the. H file and the. LIB file to the CVI project
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-do the external function call
During construction I get unresolved CVI external function call error, so this seems not work.
I did some research autour and stood up with two possible problems. Maybe one of you can help me get a bit further and do work things out.
(1) of the code of the 'real' function inside the DLL file that was not delivered to me. Or y at - it a way to get concrete results (calling external functions) with just one. H and a. LIB file (with none. Included DLL file)?
(2) the external function does not export according to the rules of Style 'C '. The signature of the function in the. H file shows some things don't like
extern "C" __declspec(dllexport) void __stdcall ...
Or maybe it's a combination of these two issues (missing. DLL + bad export style function)?
I guess I could get around the incorrect service export style when I managed to write a wrapper around the original function that actually uses Style C exporters. But I guess I need to the. DLL file for this test as well.
Thank you very much for your answers.
Best regards
Bernd
There is no need for the stuff of dllexport. There is also the option of a static library without any DLL. But the "extern"C"' is essential, because it forces the C++ compiler, which was probably used to compile the library to use the C calling convention.
If you are unable to ask the library vendor to provide a version that was compiled using C calling convention is the way to write a wrapper with VC ++ 6 around this library that functions using C calling convertion reexports. Something like
extern 'C' myfunc1 type0 (type1 arg1,...) {
Back to func1 (arg1,...);
}
for each function, you must use.
BTW. "unresolved symbol" is the error message from the linker, you can expect if you try to bind the C code against a generation of library with the C++ calling convention.
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Amar Singh deep
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How to call the program simultaneous form OPS page
hi ................
How to call a page ofa simultaneous program...
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I implement a point between third party system and Oracle inventory interface. My composite will treat the data element of the third party system and insert the data into the interface table (mtl_system_items_interface).
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HoangHoang,
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#########
TEST
#########
ttisql:
Command > create or replace FUNCTION F_SAMPLE (i_str IN VARCHAR2)
> BACK NUMBER
> o_number NUMBER;
> START
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>
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>
> EXCEPTION
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GooGyumThere are two problems with your variable declaration:
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2. you may not use a host variable type.
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He comes to work for the same code:
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GerardPublished by: Gauravv on November 9, 2009 20:16
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