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Increment the hold counter for a control
#include <aoi.h>
int32_t AoHold(const AOICtrl_t *ctrl);
- ctrl
- A pointer to the AOICtrl_t structure for the AOI control you want to hold.
libaoi.so
This function increments the hold counter for a control. If the control was previously not held, and it's a DLL, the DLL is loaded and initialized if necessary. You must hold a control before you attempt to get one of its interfaces, and release it with AoRelease() when you're finished using the interface.
0 if successful.
QNX Neutrino
Safety: | |
Interrupt handler |
No |
Signal handler |
No |
Thread |
No |
AOICtrl_t,
AoGetInterface(),
AoIterateHoldGet(),
AoRelease()
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