data types in structures

[MPrestonf12]

In a function I call I use the structure SYSTEM_POWER_STATUS. Under that stucture each different piece of information has a different data type. When I go to call it once it recieved the data it says im trying to pass a byte to argument two of MessageBox which lacks a cast. Here is a example. ACLineStatus is a byte in the structure.

int getsysdata()
{
SYSTEM_POWER_STATUS sysdata;

GetSystemPowerStatus(&sysdata);

MessageBox(NULL,sysdata.ACLineStatus, "System Data", MB_OK);

return 0;
}

thanks for your help