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 NAMEmtext_get_prop_keys - SYNOPSISint mtext_get_prop_keys (MText * mt, int pos, MSymbol ** keys) DESCRIPTIONGet a list of text property keys at a position of an M-text. The mtext_get_prop_keys() function creates an array whose elements are the keys of text properties found at position pos in M-text mt, and sets *keys to the address of the created array. The user is responsible to free the memory allocated for the array. RETURN VALUEIf the operation was successful,
  mtext_get_prop_keys() returns the length of the key list. Otherwise it
  returns -1 and assigns an error code to the external variable
  merror_code. ERRORSMERROR_RANGE SEE ALSOmtext_get_prop(), mtext_put_prop(),
  mtext_put_prop_values(), mtext_get_prop_values(),
  mtext_push_prop(), mtext_pop_prop()
 COPYRIGHTCopyright (C) 2001 Information-technology Promotion Agency (IPA)
   
 
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