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  4. MousePosition vs lParam

MousePosition vs lParam

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  • S Offline
    S Offline
    syedhassan4
    wrote on last edited by
    #1

    Why values are not same? I simple want to find the position of Cursor through LParam. But calculated values are different. Point screenMousePointOld = Control.MousePosition; Point screenMousePoint = new Point(LoWord(message.LParam.ToInt32()), HiWord(message.LParam.ToInt32())); private static int HiWord(int number) { if ((number & 0x80000000) == 0x80000000) return (number >> 16); else return (number >> 16) & 0xffff ; } private static int LoWord(int number) { return number & 0xffff; } What I am doing wrong?

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    • S syedhassan4

      Why values are not same? I simple want to find the position of Cursor through LParam. But calculated values are different. Point screenMousePointOld = Control.MousePosition; Point screenMousePoint = new Point(LoWord(message.LParam.ToInt32()), HiWord(message.LParam.ToInt32())); private static int HiWord(int number) { if ((number & 0x80000000) == 0x80000000) return (number >> 16); else return (number >> 16) & 0xffff ; } private static int LoWord(int number) { return number & 0xffff; } What I am doing wrong?

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      fang_eric
      wrote on last edited by
      #2

      Since LParam is 64 bit number, so you have to convert it to int64 type.

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