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This function suspends power to the device. It is useful only with devices that can be shut off under software control. Such devices are typically, but not exclusively, PC Card devices.
void XXX_PowerDown( DWORD hDeviceContext );
Parameters
- hDeviceContext
- Handle to the device context. The call to the
XXX_Initfunction returns this identifier.
Return Values
None.
Remarks
The operating system invokes this function to suspend power to the device. The operating system might call this function when it is about to enter the power-save mode. This function should not call any functions that might cause it to block, and it should return as quickly as possible. One strategy for returning quickly is to have this function set a global variable to indicate that a power loss occurred and to defer any complicated processing until later, when the driver's XXX_PowerUpfunction is called.
Requirements
Runs on Versions Defined in Include Link to Windows CE OS 1.0 and later Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
Last updated on Tuesday, July 13, 2004