The TBM_SETTHUMBLENGTH message sets the length of the slider in a trackbar. This message is ignored if the trackbar does not have the TBS_FIXEDLENGTH style.
TBM_SETTHUMBLENGTH wParam = (WPARAM) (UINT) iLength; lParam = 0;
No return value.
file: /Techref/os/win/api/win32/mess/src/msg18_15.htm, 1KB, , updated: 2000/4/7 11:20, local time: 2024/11/13 11:54,
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