| 1 | Display mode | Input | Char(1) |
| 2 | Mode indication | Output | Char(1) |
| 3 | Low-level environment handle | Input | Binary(4) |
| 4 | Error code | I/O | Char(*) |
| Mode indication | Output | Binary(4) |
The Query Display Mode Support (QsnQryModSup) API determines if the current display device supports the given mode. Certain devices, like the 3486 and 3487, support 27x132 mode but can be switched by keystroke to turn off the wide capability. This will be reflected in the result returned by the QsnQryModSup API. Use this API to determine if a subsequent mode change request through the Clear Screen (QsnClrScr) API is valid. You can use the result of the Query 5250 (QsnQry5250) API to determine if the display is capable of supporting wide mode or not.
None.
The display mode for which to query support. The possible values are:
| 3 | 24x80 mode |
| 4 | 27x132 mode |
Whether the device allows the specified mode or not. The possible values are:
| 0 | Device does not support the mode |
| 1 | Device supports the mode |
The low-level environment that the operation applies to. If this parameter is omitted or given with a value of zero, the default low-level environment is used.
The structure in which to return error information. For the format of the structure, see Error code parameter. If this parameter is omitted, diagnostic and escape messages are issued to the application.
This API returns the value for the mode indication parameter if successful, or -1 otherwise.
| Message ID | Error Message Text |
|---|---|
| CPF24B4 E | Severe error while addressing parameter list. |
| CPF3CF1 E | Error code parameter not valid. |
| CPF3CF2 E | Error(s) occurred during running of &1 API. |
| CPFA322 E | Incorrect display mode &1 specified. |
| CPFA334 E | Low level environment handle incorrect. |
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