| WORD ctx(cid, ch) | |||
| int cid; | |||
| int ch; |
The ctx function places a character in a special holding variable to ensure it will be the next character to be transmitted. The function will return an error code if the special holding variable already contains a character. USER calls this function whenever an application calls the TransmitCommChar function (USER.206).
cid
Identifies the communications device.
ch
Specifies the character to transmit.
The return value is zero if the function is successful. The return value is one of the following values if there is an error.
| Value | Meaning |
| 0x8000 | The function received an invalid cid parameter. |
| 0x4000 | The function could not write to the parallel port or there's already a character waiting for immediate transmission. |
The export ordinal for this function is 6.