lcd.createChar before and after lcd.begin

i noticed that, in setup bloc, when write

code: [select]

lcd.begin(16,2);
before

code: [select]

lcd.createchar command dosent display , lcd remains blank ( compile).
but when put lcd.begin after lcd.createchar works fine , why?

i'm surprised .createchar() works before .begin() sets interface 4-bit mode.  .send() function uses data set constructor know if interface supposed 8-bit or 4-bit (most people use 4-bit save pins)  until call .begin() interface mode isn't explicitly set.

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