# WM_IsExistAllowedChannel

## C Specification

      #include <nitro/wm.h>

      BOOL WM_IsExistAllowedChannel( void );

## Arguments

None.

## Return Values

Returns TRUE if at least one wireless channel exists that can be used.
Returns FALSE if use is prohibited for all wireless channels.

## Description

Checks whether a channel exists that can be used for wireless communications.
This function can be executed even before initialization, and regardless of the WM state.

## Note

If this function returns FALSE, that means there are no usable channels and wireless communications are not possible.Be aware that FALSE can sometimes be returned when a unit is being used in a special environment where wireless communications are prohibited.

## See Also

`WM_GetAllowedChannel`

## Revision History

12/21/2004 Initial version.