Kbase 18113: How to Call WIN32 API Function: Asin (Arcsine)
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
01/07/2009 |
|
Status: Unverified
GOAL:
How to Call WIN32 API Function: Asin (Arcsine)
FACT(s) (Environment):
Windows 32 Intel
Windows NT 32 Intel/Windows 2000
FIX:
The following sample code shows how to call the Win32 trigonometric function called Asin which resides in the Microsoft Visual C++ runtime library called MSVCRT40.DLL. This function returns the arcsine of an angle in radians.
DEFINE VARIABLE decResult AS DECIMAL NO-UNDO.
PROCEDURE asin EXTERNAL "MSVCRT40.DLL" CDECL:
DEFINE INPUT PARAMETER dblValue AS DOUBLE NO-UNDO.
DEFINE RETURN PARAMETER dblResult AS DOUBLE NO-UNDO.
END PROCEDURE.
/* The input parameter to the asin call must be a number */
/* between -1 and 1. Using any other number will cause */
/* the function call to hang. */
RUN asin (INPUT 0.655, OUTPUT decResult).
MESSAGE "The Arcsine of 0.655 is " decResult VIEW-AS ALERT-BOX.