BM_SETDEFAULT - Parameters
usdefault
(
USHORT
)
Default state.
TRUE
Display the button control in the default state
FALSE
Display the button control in the nondefault state.
ulReserved
(
ULONG
)
Reserved value, should be 0.
rc
(
BOOL
)
Success indicator.
TRUE
Successful operation
FALSE
Error occurred.
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