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Siemens Industry Online Support
Siemens AG
Entry type: FAQ Entry ID: 22279366, Entry date: 11/23/2005
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How can you incorporate your own header files in C scripts?

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Instructions:
You can incorporate your own header files by proceeding as follows.
 

No. Procedure Validity
1 Header definition as first statement in the function body
Insert your header definition as first statement after the brace.


Fig. 01
 
 
Graphics Designer,
Global Script
2 Extension of the standard header file "apdefap.h"
Open the standard header file "apdefap.h" with the Global Script editor or a simple ASCII editor (notepad.exe). The "apdefap.h" file is in the WinCC project path  ".\library\apdefap.h".

Enter you header definition.


Fig. 02
 
 
Graphics Designer,
Global Script
3 Header definition before the function declaration
In the case of Global Script functions you can insert additional header files before the function declaration.


Fig. 03
 
 
Global Script

The requirement for all three methods is that the header file to be incorporated is located in the "Search Path" for Global Script. For example, this can be:

  • "<WinCC project path>\library" or
  • <WinCC installation path>\aplib"

Important:
You must make sure that the code in the header is not executed twice. You can ensure this by using appropriate C preprocessor statements.


Fig. 04
 
 


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