In the documentation of a 3rd party DLL file that talks to an I/O card, I get the following function.
How do I get a window handle? and how do I do a declare dll for this format (with TRUE/FALSE parameter)?
Here's the documentation reproduced.
Begin:-

DRV_SelectDevice
status = DRV_SelectDevice(hCaller, GetModule, DeviceNum, Description)
Purpose


Parameters
hCaller - Specify the windows handle calling this function
GetModule - Boolean type
DeviceNum - Device Number
Description - Description of the device


Return:

1. If successful, then return 0

2. If unsuccessful, then return 1

End
I've difficulty in hCaller and GetModule.
For hCaller, what is this windows handle?
For GetModule, this is a boolean type parameter. How do I declare boolean in Declare dll function

Any help is appreciated.
Yau