WIAS_TRACE - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// wiamdef.h
void WIAS_TRACE(
x
);
View the official Windows Driver Kit DDI reference// wiautil.h
void WIAS_TRACE(
x
);
View the official Windows Driver Kit DDI referenceNo description available.
The WIAS_TRACE macro writes a diagnostic message to the Wiatrace.log file.
xHInst - Handle to the DLL (driver).
format_string, ... - Specifies a variable argument list, which starts with an ANSI format string that describes the message and any format identifiers. The ellipsis (...) specifies a variable number of arguments that need to be output. The error text should be prefixed with the full name of the method or function and generate the message in the format of "class::method, error-text".
To enable tracing in free builds, drivers must define the WIA_DEBUG macro by adding #define WIA_DEBUG before including any of the WIA headers. Tracing is enabled by default in checked and debug builds of the operating system.
The following is an example of how the macro would be used:
WIAS_TRACE((g_hInst,"WIA storage path = %ws",m_wszStoragePath));
This code snippet was taken from Wiadriver.cpp, which is included with the Windows Image Acquisition (WIA) driver samples on GitHub.
The WIAS_TRACE macro writes a diagnostic message to theWiatrace.log file.
xHInst - Handle to the DLL (driver).
format_string, ... - Specifies a variable argument list, which starts with an ANSI format string that describes the message and any format identifiers. The ellipsis (...) specifies a variable number of arguments that need to be output. The error text should be prefixed with the full name of the method or function and generate the message in the format of "class::method, error-text".
To enable tracing in free builds, drivers must define the WIA_DEBUG macro by adding #define WIA_DEBUG before including any of the WIA headers. Tracing is enabled by default in checked and debug builds of the operating system.
The following is an example of how the macro would be used:
WIAS_TRACE((g_hInst,"WIA storage path = %ws",m_wszStoragePath));
This code snippet was taken fromWiadriver.cpp, which is included with the WDK.