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<< Click to Display Table of Contents >> Navigation: ThinBASIC Modules > Eval (Math and string expression evaluator) > Eval_LinkExt |
Description
Define a link between a thinBasic script extended variable and an Eval_... formula variable
This function automatically will create VariableName in Eval module and will link it to an extended variable of thinBasic script.
Syntax
n = Eval_LinkExt(VariableName, PointerToAnEXTvar, InitialValue)
Returns
Number, always zero
Parameters
Name |
Type |
Optional |
Meaning |
VariableName |
String |
No |
The name of the variable you want create |
PointerToAnEXTvar |
Number |
No |
A pointer to an extended variable present in thinBasic script |
InitValue |
Number |
No |
An initial value to assign to variable |
Remarks
Use VARPTR to pass pointer to extended variable in script.
Restrictions
See also
Examples
USES "EVAL"
Dim result As EXT
Dim MyScriptX As EXT
'--Creates an Eval internal variable X and link with script variable MyScriptX
EVAL_LinkExt("X", VARPTR(MyScriptX), 10)
result = EVAL_math ( "x^2") '---this return 100
MSGBOX 0, Result