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This simple dllcall gives me error 5, access denied, Func _WinAPI_VkKeyScan($__key) _WinAPI_SetLastError(0) $res = DllCall('User32.dll', 'SHORT', 'VkKeyScan', 'CHAR', $__key) _xConsole('res: '&$res) $_LastErr = _WinAPI_GetLastError() If $_LastErr <> 0 Then _xConsole('Err: {' & $_LastErr & '}> ' & _WinAPI_GetLastErrorMessage()) Return $res EndFunc Am i doing something wrong? Also tried VkKeyScanA and W Edit: I want to send `:` via PostMessage() WM_KEYDOWN

So I had this Idea of creating a tooltip which shows me my ping. That itself was made quickly and I thought too add a couple features. I want the tooltip background to be a different color depending on the ping. (good ping is green, medium ping is yellow,...) So how do I color in a tooltip? google brought me to this: where in the comments I found this: $s = "LOW" ToolTip($s, 0, 0, "Battery Information");, $icon) $H_TOOLTIP1 = WinGetHandle($s) DllCall("UxTheme.dll", "int", "SetWindowTheme", "hwnd", $H_TOOLTIP1, "wstr", "", "wstr", "") DllCall("user32.dll", "int", "SendMessage", "hwnd", $H_TOOLTIP1, "int", 1043, "int", 2552550, "int", 0) Sleep(1000) Which I then used in my code with different color codes... Trial and Error brought me these that I wanted to use: The Problem is if I loop through my code it only sets the color for the 1st loop and then sticks to it. The real problem is tho that I don't exactly understand the dllcalls... And I guess that's why it isn't working So if someone would be so awesome to explain to me how they work, or at least can give me a list of these parameters then I would really appreciate that and learn something new Obviously a solution to my problem is awesome aswell ^^ I run this under Windows 8.1 There is my code in a paste. https://pastebin.com/q525f7mS