thank you Fisher and JavaFan ,i mean such as tbgl_translate(...) ---> translate_gl(...)
your code works with many words,sample of that converted words inside htm files such as:
href="SetMaterialSpecular_gl.htm">SetMaterialSpecular_gl
CLASS="f_Code_Keyword">SetMaterialSpecular_gl
but i have found that some words does not converted, it is in htm files not text , the not converted words like this inside the htm files:
CLASS="f_Code_Keyword">TBGL_SetMaterialDiffuse( hMaterial, R, G, B )
i want to replace TBGL_SetMaterialDiffuse(...) by
SetMaterialDiffuse_gl(...)
and so on for other words
my code until now using javaFan regex:

$file = "TBGL_SetMaterialDiffuse.htm";
open(FILE, $file) || die $!;
$txt = do { local $/; <FILE> };
close FILE;
$txt =~ s/tbgl_(\pL+)/${1}_gl/g;
open FILE, ">output.htm" or die $!;
print FILE $txt;
close FILE;
[download]

thanks

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