有关用C#调用VC的DLL的接口问题

[Emma_Hugo]

vc被调函数：
int WINAPI LoadPointsFromScreen( ALLPOINTS v_points );
其中：
struct ALLPOINTS
{
int points_num; //数量
POINT* points_pos; //值
};
--------------------------------------------------
c#中定义该结构体：
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
public int x;
public int y;
}

[StructLayout(LayoutKind.Sequential)]
public struct ALLPOINTS
{
public int points_num;
public IntPtr points_pos;
}
定义该函数：
[DllImport("SelectAutoFitArea.dll")]
extern static int LoadPointsFromScreen(ALLPOINTS v_points);

可是在调用的时候，我该如何为参数赋值啊？因为里面有一个指针。
我现在有一个POINT类型的数组，应该怎么把它转化为IntPtr类型？？？

[gomoku]

Point[] points = ...;
GCHandle gch = GCHandle.Alloc(points, GCHandleType.Pinned);
v_points.points_num = points.Length;
v_points.points_pos = gch.AddrOfPinnedObject();
{
    LoadPointsFromScreen(v_points);
}
gch.Free();

[xufzu123]

没遇到过~up

[wjf8882300]

用数组,C++中的指针转到C#中就只有用数组做了.

[蓝海D鱼]

up

[Garnett_KG]

[Quote=引用 1 楼 gomoku 的回复:]
C# codePoint[] points=...;
GCHandle gch=GCHandle.Alloc(points, GCHandleType.Pinned);
v_points.points_num=points.Length;
v_points.points_pos=gch.AddrOfPinnedObject();
{
LoadPointsFromScreen(v_points);
}
gch.Free();
[/Quote]
ding