[Closed] How to setup LB_GETTEXT??

I’ve double-checked what returns with LB_GETTEXT message. It’s c-style string (chars + null terminator) . So we have to allocate one char more memory then length of the listbox item text.

finally:

fn getListBoxText hWnd i =
(
	LB_GETTEXT = 0x189
	LB_GETTEXTLEN = 0x18A
	marshal = dotnetclass "System.Runtime.InteropServices.Marshal"
	
	len = windows.sendmessage hWnd LB_GETTEXTLEN i 0
	lParam = marshal.AllocHGlobal (marshal.SystemDefaultCharSize*(len+1))
	windows.sendmessage hWnd LB_GETTEXT i lParam
		
	ptr = dotnetobject "System.IntPtr" lParam
	str = marshal.PtrToStringAnsi ptr
	marshal.FreeHGlobal ptr
	str
)