IF yoiu are using edits component with mask (Numeric, data, etc) be carefull at regional setings. For example if decimal points is set to ',' and your program use '.', the application will generate fatal exception... and is almost impossible to debug...
so in dpr project add this lines to fix that:
Application.UpdateFormatSettings:=False; //by default is TRUE
DecimalSeparator:=your format; //read about sysutils routines
ShortDateFormat:=your format;
Application.Initialize;
.....
you have to include also sysutils...
hope this helps,
//a