regex101: PCRE (Legacy) Match Workspace

Pro

^start of line

Negative Lookahead(?![^\S\r\n]*//)

Negated Character Class[^\S\r\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

//the literal text //

Negated Character Class[^\S\r\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

MessageBoxthe literal text MessageBox (case insensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\s*any whitespace character, repeated any number of times

Non-Capturing Group(?:[^,]*,){3}

{3}repeats the group contents below exactly 3 times:

Negated Character Class[^,]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

Negative Lookahead(?!.*MB_TASKMODAL)

.*any character (except for line terminators), repeated any number of times

MB_TASKMODALthe literal text MB_TASKMODAL (case insensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

25 tokens

Regular Expression

^(?![^\S\r\n]*//)[^\S\r\n]*MessageBox\(\s*(?:[^,]*,){3}\s*(?!.*MB_TASKMODAL)

New

// Messagebox(a,b,c, mb_ok);
Messagebox(a,b,c, mb_ok|mb_taskmodal);
Messagebox(a,b,c, mb_ok);


MessageBox(NULL, txtStr, "Error", MB_OK); hellow
//MessageBox(NULL, "SUCCESS", "SUCCESS ", MB_OK);hellow
// MessageBox(NULL, txtStr, "Error ",  | MB_OK);hellow
MessageBox( NULL, txtStr, "Error", MB_OK ); hellow 
MessageBox( NULL, txtStr, "Error", MB_OK |MB_TASKMODAL); hellow
hellow
//MessageBox(NULL, "SUCCESS", "SUCCESS ", MB_OK); hellow



     MessageBox(NULL, txtStr, "Error", MB_OK); hellow