ConfigDriver Function

Článek
02/28/2023

Conformance
Version Introduced: ODBC 2.5

Summary
ConfigDriver allows a setup program to perform install and uninstall functions without requiring the program to call ConfigDSN. This function will perform driver-specific functions such as creating driver-specific system information and performing DSN conversions during installation, as well as cleaning up system information modifications during uninstall. This function is exposed by the driver setup DLL or a separate setup DLL.

Syntax

  
BOOL ConfigDriver(  
      HWND    hwndParent,  
      WORD    fRequest,  
      LPCSTR  lpszDriver,  
      LPCSTR  lpszArgs,  
      LPSTR   lpszMsg,  
      WORD    cbMsgMax,  
      WORD *  pcbMsgOut);

Arguments

hwndParent
[Input] Parent window handle. The function will not display any dialog boxes if the handle is null.

fRequest
[Input] Type of request. The fRequest argument must contain one of the following values:

ODBC_INSTALL_DRIVER: Install a new driver.

ODBC_REMOVE_DRIVER: Remove a driver.

This option can also be driver-specific, in which case the fRequest argument for the first option must start from ODBC_CONFIG_DRIVER_MAX+1. The fRequest argument for any additional option must also start from a value greater than ODBC_CONFIG_DRIVER_MAX+1.

lpszDriver
[Input] The name of the driver as registered in the Odbcinst.ini key of the system information.

lpszArgs
[Input] A null-terminated string containing arguments for a driver-specific fRequest.

lpszMsg
[Output] A null-terminated string containing an output message from the driver setup.

cbMsgMax
[Input] Length of lpszMsg.

pcbMsgOut
[Output] Total number of bytes available to return in lpszMsg.

If the number of bytes available to return is greater than or equal to cbMsgMax, the output message in lpszMsg is truncated to cbMsgMax minus the null-termination character. The pcbMsgOut argument can be a null pointer.

Returns

The function returns TRUE if it is successful, FALSE if it fails.

Diagnostics

When ConfigDriver returns FALSE, an associated *pfErrorCode value is posted to the installer error buffer by a call to SQLPostInstallerError and can be obtained by calling SQLInstallerError. The following table lists the *pfErrorCode values that can be returned by SQLInstallerError and explains each one in the context of this function.

*pfErrorCode	Error	Description
ODBC_ERROR_INVALID_HWND	Invalid window handle	The hwndParent argument was invalid.
ODBC_ERROR_INVALID_REQUEST_TYPE	Invalid type of request	The fRequest argument was not one of the following: ODBC_INSTALL_DRIVER ODBC_REMOVE_DRIVER The driver-specific option was less than or equal to ODBC_CONFIG_DRIVER_MAX.
ODBC_ERROR_INVALID_NAME	Invalid driver or translator name	The lpszDriver argument was invalid. It could not be found in the registry.
ODBC_ERROR_REQUEST_FAILED	Request failed	Could not perform the operation requested by the fRequest argument.
ODBC_ERROR_DRIVER_SPECIFIC	Driver- or translator-specific error	A driver-specific error for which there is no defined ODBC installer error. The SzError argument in a call to the SQLPostInstallerError function should contain the driver-specific error message.

Comments

Driver-Specific Options

An application can request driver-specific features exposed by the driver by using the fRequest argument. The fRequest for the first option will be ODBC_CONFIG_DRIVER_MAX plus 1, and additional options will be incremented by 1 from that value. Any arguments required by the driver for that function should be provided in a null-terminated string passed in the lpszArgs argument. Drivers providing such functionality should maintain a table of driver-specific options. The options should be fully documented in driver documentation. Application writers who use driver-specific options should be aware that this will make the application less interoperable.

Messages

A driver setup routine can send a text message to an application as a null-terminated string in the lpszMsg buffer. The message will be truncated to cbMsgMax minus the null-termination character by the ConfigDriver function if it is greater than or equal to cbMsgMax characters.

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