<急>关于API->SystemParametersInfo的使用...

Question

BOOL b;
　
SystemParametersInfo(0x0060, TRUE, &b, NULL);如上的格式...在C#中该如何定义和使用呢???

Answer 1

NONCLIENTMETRICS nm;  SystemParametersInfo(0x0029,sizeof(nm),&nm,0);还有这一种! 结构体NONCLIENTMETRICS已经定义好了...就是不知道这种形式的SystemParametersInfo在C#中又如何怎样定义...郁闷,SystemParametersInfo究竟有多少种重载方式...请各位指点...

Answer 2

[DllImport("user32.dll", EntryPoint="SystemParametersInfo")]
public static extern int SystemParametersInfo (
int uAction,
int uParam,
ref int lpvParam,
int fuWinIni
);[StructLayout(LayoutKind.Sequential)]
public struct NONCLIENTMETRICS {
public int cbSize;
public int iBorderWidth;
public int iScrollWidth;
public int iScrollHeight;
public int iCaptionWidth;
public int iCaptionHeight;
public LOGFONT lfCaptionFont;
public int iSMCaptionWidth;
public int iSMCaptionHeight;
public LOGFONT lfSMCaptionFont;
public int iMenuWidth;
public int iMenuHeight;
public LOGFONT lfMenuFont;
public LOGFONT lfStatusFont;
public LOGFONT lfMessageFont;
}

Answer 3

感谢楼上...具体调用怎样写...主要是这一段不明白怎样传进去: sizeof(nm),&nm有C#中使用sizeof时报错了...

Answer 4

哪一项需要用sizeof？
如果一定要用sizeof，就项目属性里。选中：允许不安全代码。

Answer 5

它的写法是这样...
SystemParametersInfo(0x0029,sizeof(nm),&nm,0);我不明白怎样把结构体nm传进去.是ref nm.GetHashCode()吗???

Answer 6

最好把SystemParametersInfo(0x0029,sizeof(nm),&nm,0);翻成C#的...嘻嘻...

Answer 7

[DllImport("user32.dll", EntryPoint="SystemParametersInfo")]
public static extern int SystemParametersInfo (
int uAction,
int uParam,
ref NONCLIENTMETRICS lpvParam,
int fuWinIni
);

Answer 8

能不用API解决最好别用APISystem.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.PMDesignator;

Answer 9

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        private struct LOGFONT
        {
            public int lfHeight;
            public int lfWidth;
            public int lfEscapement;
            public int lfOrientation;
            public int lfWeight;
            public byte lfItalic;
            public byte lfUnderline;
            public byte lfStrikeOut;
            public byte lfCharSet;
            public byte lfOutPrecision;
            public byte lfClipPrecision;
            public byte lfQuality;
            public byte lfPitchAndFamily;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string lfFaceSize;
        }        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        private struct NONCLIENTMETRICS
        {
            public int cbSize;
            public int iBorderWidth;
            public int iScrollWidth;
            public int iScrollHeight;
            public int iCaptionWidth;
            public int iCaptionHeight;
            public LOGFONT lfCaptionFont;
            public int iSmCaptionWidth;
            public int iSmCaptionHeight;
            public LOGFONT lfSmCaptionFont;
            public int iMenuWidth;
            public int iMenuHeight;
            public LOGFONT lfMenuFont;
            public LOGFONT lfStatusFont;
            public LOGFONT lfMessageFont;
        }         const int SPI_GETNONCLIENTMETRICS = 0x0029;
        const int SPI_SETNONCLIENTMETRICS = 0x002A;        [DllImport("user32.dll", SetLastError=true, CharSet=CharSet.Auto)]
private static extern bool SystemParametersInfo(int uiAction, int uiParam,
ref NONCLIENTMETRICS ncMetrics, int fWinIni);        private void button4_Click(object sender, EventArgs e)
        {
            NONCLIENTMETRICS nm = new NONCLIENTMETRICS();
            int nSize = Marshal.SizeOf(nm);
            nm.cbSize = nSize;
            SystemParametersInfo(SPI_GETNONCLIENTMETRICS, nSize, ref nm, 0);
            nm.iCaptionHeight = 20;
            SystemParametersInfo(SPI_SETNONCLIENTMETRICS, nSize, ref nm, 0);
            //GetCaptionFont();
        }