[MSDN Library April 2000] BM_GETCHECK (100%)
MSDN Library - April 2000 > Platform SDK > User Interface Services > Windows User Interface > Controls > Buttons > Button Reference > Button Messages
[MSDN Library September 1992] BM_GETCHECK (54.9003189792663%)
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[MSDN Library September 1992] BM_GETCHECK (49.5210727969349%)
Product Documentation > QuickC for Windows > Windows Programming Reference > Chapter 6 Messages Directory
[MSDN Library April 2000] BM_GETCHECK (48.0689102564103%)
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[MSDN Library September 1992] BM_GETCHECK (44.6862348178138%)
Product Documentation > Windows 3.1 SDK > Programmer's Reference Volume 3: Messages, Structures, and Macros > Chapter 2 Messages > 2.1 Window Messages