WM_SETWINDOWPARAMS (in Circular Slider Controls) - Parameters

pwndparams (PWNDPARAMS)

Pointer to a WNDPARAMS window parameter structure.

This structure contains:

status (ULONG)

Window parameter selection.

Identifies the window parameters that are to be set. The valid value for the slider control is:
WPM_TEXT

Window text.
The flags in the status field are cleared as each item is processed. If the call is successful, the status field is 0. If any item has not been processed, the flag for that item remains set.
length (ULONG)
Length of the window text.
text (PSZ)
Window text.
presparamslength (ULONG)
Length of presentation parameters.
presparams (PVOID)
Presentation parameters.
ctldatalength (ULONG)
Length of window class-specific data.
ctldata (PVOID)
Window class-specific data.

ulReserved (ULONG)

Reserved value, should be 0.

rc (BOOL)

Success indicator.

TRUE

Successful operation
FALSE
Error occurred.

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