Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
L_AutEnumContainers
#include "ltaut.h"
L_LTAUT_API L_INT L_AutEnumContainers(pAutomation, pEnumProc, pUserData )
pAUTOMATIONHANDLE pAutomation; |
/* pointer to an automation handle */ |
pAUTOMATIONENUMCONTAINERPROC pEnumProc ; |
/* optional callback function */ |
L_VOID *pUserData; |
/* pointer to more parameters for the callback */ |
Enumerates all containers associated with the specified automation handle.
Parameter |
Description |
pAutomation |
Pointer to an automation handle. |
pEnumProc |
Optional callback function for additional processing. |
|
If you do not provide a callback function, use NULL as the value of this parameter. If you do provide a callback function, use the function pointer as the value of this parameter. The callback function must adhere to the function prototype described in the AUTOMATIONENUMCONTAINERPROC Function. |
pUserData |
Void pointer that you can use to pass one or more additional parameters that the enumeration callback function needs. |
|
To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID *. The callback function, which receives the address in its own pUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure. If the additional parameters are not needed, you can pass NULL in this parameter. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
For each container enumerated by this function, the AUTOMATIONENUMCONTAINERPROC callback function is called.
The enumeration process continues until the last container is enumerated or the callback function returns 0 or an error.
Required DLLs and Libraries
LTAUT For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application |
See Also
Functions: |
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Topics: |
Example
This example shows how to enumerate the automation containers.
/* User defined enumeration callback function */ L_INT EXT_CALLBACK EnumContainersCallback (pCONTAINERHANDLE pContainer, L_VOID* pUserData ) { UNREFERENCED_PARAMETER(pUserData); /* reset the passed container handle */ L_ContainerReset ( pContainer ) ; /* return SUCCESS to continue the enumeration */ return SUCCESS ; } L_INT AutEnumContainersExample(pAUTOMATIONHANDLE pAutomation) { L_INT nRet; nRet = L_AutIsValid ( pAutomation ); if ( SUCCESS == nRet) /* check the validity of the automation handle */ { /* start enumerating the current added automation containers */ nRet = L_AutEnumContainers ( pAutomation, EnumContainersCallback, NULL ); if(nRet != SUCCESS) return nRet; return SUCCESS ; } else { return nRet ; } }