Building 64-bit applications on Windows

Both 32-bit and 64-bit applications are supported on IBM MQ for Windows. The IBM MQ executable and library files are supplied in both 32-bit and 64-bit forms, use the appropriate version depending on the application you are working with.

Executable files and libraries

Both 32-bit and 64-bit versions of the IBM MQ libraries are supplied in the following locations:

Table 1. Location of IBM MQ libraries
Library version	Directory containing library files
32-bit	MQ_INSTALLATION_PATH \Tools\Lib
64-bit	MQ_INSTALLATION_PATH \Tools\Lib64

MQ_INSTALLATION_PATH represents the high-level directory in which IBM MQ is installed.

32-bit applications continue to work normally after migration. The 32-bit files exist in the same directory as in previous versions of the product.

If you want to create 64-bit version you must ensure that your environment is configured to use the library files in MQ_INSTALLATION_PATH \Tools\Lib64. Ensure that the LIB environment variable is not set to look in the folder containing the 32-bit libraries.