If statement

I am trying to write an if statement
I have only done this once an it was 2yrs ago
here is where i am reading from which is not making sense yet
it seems simple all i want it to do is check each link an compare with last link
http://www.autohotkey.com/docs/commands/IfEqual.htm

Code:

IniWrite, %Link%,  num.ini, Url, %hh%<----this is newly found link
IniRead, Link2,  num.ini, Got, %hf%<----this is last link
IfEqual, Link, %link2% (same: if var = value) 

COM_Invoke(pwb, "Navigate", Link)<----this is excuting the link
IniWrite, %Link%,  num.ini, Got, %hf%<---this one keeps track of links clicked

IfEqual, var, value

IfEqual, Link, link2

Though I do not know if you can use a variable for the value...But maybe... I have no idea what your trying to do...

compare 2 links to see if there the same

Code:

IniWrite, %Link%, %A_WorkingDir%\num.ini, Url, %hh%
IniRead, Link2, %A_WorkingDir%\num.ini, Got, %hf% 

If  %Link% = %link2%  
{
    Goto, Start
        Return
}
COM_Invoke(pwb, "Navigate", Link)
IniWrite, %Link%, %A_WorkingDir%\links.ini, Got, %hf%

if Var in MatchList
if Var not in MatchList
if Var contains MatchList
if Var not contains MatchList
http://www.autohotkey.com/docs/commands/IfIn.htm
maybe one of these will help me out

Because the items in MatchList are not treated as individual parameters, the list can be contained entirely within a variable. In fact, all or part of it must be contained in a variable if its length exceeds 16383 since that is the maximum length of any script line. For example, MatchList might consist of %List1%,%List2%,%List3% -- where each of the sublists contains a large list of match phrases.


Examples

if var in exe,bat,com <--from there examples
MsgBox The file extension is an executable type.

if %Link% in Url.exe <---this is my code i just wrote from there example
{
Goto, Start
Return
}
if link not found excute Rest of script
would i need else statement

If link = %varcontaininglinkyouwant%
{
goto....
}

Code:

if %Link% in url.txt
{ Goto, Start 
Return 
} 
else 
{ 
COM_Invoke(pwb, "Navigate", Link)
IniWrite, %Link%, %A_WorkingDir%\links.ini, Got, %hf%
hf += 1
hh += 1
Sleep, 10000}

thanks to precise