_DoInsertText
void _DoInsertText(const char* text, int32 length,
_DoInsertText(text, strlen(text), fSelStart, runs);
_DoInsertText(text, strnlen(text, length), fSelStart, runs);
_DoInsertText(text, strnlen(text, length), offset, runs);
_DoInsertText(bytes, numBytes, fSelStart, NULL);
_DoInsertText(Text() + start, offset - start, fSelStart, NULL);
_DoInsertText(bytes, numBytes, fSelStart, NULL);