c++ - How to use C# textbox inputs with C structs and imports -


i have library (*.dll file) written in c. trying use windows form application building. have redefined struct needed import work. how can assign values variables in struct.

[dllimport("hdnpic.dll")]         public static extern int hidden(hid4cinp hid4cinp);          [structlayout(layoutkind.sequential)]         public struct hid4cinp         {             public const int maxsize = 500;             public double alpha_c;             public double alpha_m;             public double alpha_y;             public double alpha_k;             public double freq;             public double dsmp;             public double cdxy;             public double cdhi_c;             public double cdhi_m;             public double cdhi_y;             public double cdhi_k;             public double amp1;             public double perd;             public int funtype;             public int smooth;             public int inpres;             public int width;             public int height;           }

i have written code in c#. can suggest me how assign values hid4cinp struct variables.

try following :

using system; using system.collections.generic; using system.linq; using system.text; using system.runtime.interopservices;  namespace consoleapplication73 {     class program     {         [dllimport("hdnpic.dll")]         public static extern int hidden(intptr hid4cinp);          [structlayout(layoutkind.sequential)]         public struct hid4cinp         {             public const int maxsize = 500;             public double alpha_c;             public double alpha_m;             public double alpha_y;             public double alpha_k;             public double freq;             public double dsmp;             public double cdxy;             public double cdhi_c;             public double cdhi_m;             public double cdhi_y;             public double cdhi_k;             public double amp1;             public double perd;             public int funtype;             public int smooth;             public int inpres;             public int width;             public int height;           }                 static void main(string[] args)         {              hid4cinp hid4cinp = new hid4cinp();              hid4cinp.alpha_c = 123;              intptr hid3cinpptr = marshal.allochglobal(marshal.sizeof(hid4cinp));             marshal.structuretoptr(hid4cinp, hid3cinpptr, true);              int results = hidden(hid3cinpptr);         }     }  }

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