TDIRegExMaskEdit Problem I have a Delphi form with a TDIRegExMaskEdit component named DIRegExMaskEdit1. OnEnter of DIRegExMaskEdit1. I create a TDIPerlRegEx object and assign it to variable DIPerlRegEx1 DIPerlRegEx1.CompileMatchPatternStr('^[a-zA-Z-]+$'); DIRegExMaskEdit1.RegEx := DIPerlRegEx1; My aim is to allow just one English word to be entered in the mask field. I enter some characters in the field, nd get the expected behaviour. OnExit of DIRegExMaskEdit1. I carry out some checks on the English word using DIPerlRegEx1.Match(0); Then I free the DIPerlRegEx1 object. If I then enter the DIRegExMaskEdit1 component again and use the backspace key to remove characters from the word that I previously entered, the backspace key fails to remove the last remaining character, no matter which character that is. Is this a bug in TDIRegExMaskEdit or is it a problem with the regular expression that I am using in DIPerlRegEx1? Regards John