Create main.lua

Author: Python1320

main.lua

@@ -0,0 +1,30 @@
+local ffi = require("ffi")
+require("win32.sdkddkver")
+require("win32.errhandlingapi")
+require("win32.wingdi")
+require("win32.winuser")
+require("win32.winerror")
+local C = ffi.C
+local user32 = ffi.load"user32"
+ffi.cdef("size_t strlen(const char *);")
+
+function SendValve001Command(msg)
+	local Valve001 = user32.FindWindowA("Valve001", nil)
+	local Valve001Num = tonumber(ffi.cast("intptr_t", Valve001))
+	if Valve001Num == 0 then return nil, 'Valve001 not found' end
+
+	local copyData = ffi.new("COPYDATASTRUCT[1]", {
+		{
+			dwData = 0x0,
+			cbData = C.strlen(msg) + 1,
+			lpData = ffi.cast("void*", msg)
+		}
+	})
+
+	local ok = user32.SendMessageA(Valve001, C.WM_COPYDATA, ffi.cast("WPARAM", Valve001), ffi.cast("LPARAM", ffi.cast("LPVOID", copyData)))
+	if ok == 1 then return true end
+
+	return nil, ok == 0 and "sendmessage failed" or ok
+end
+
+print("SendValve001Command", SendValve001Command("say asd"))