I had created game using Form, and 2 arrays of pictureboxes. I make everything, but it go very slow, so I asked my theacher how can it make faster, he said what it some function, that make project of game faster, but he didn't know hier names. So I tried search in msdn but fuond nothig. Can anybody help with this functions ? I using visual studio c++.

I added #pragma once in first line of classes.h but I still get that error

I had created class in one classes.h file. I included this file in Form1.h, created Class^ c = gcnew Class(); and call one of function. When I wanted to run my procjet I get error LNK2005: "public: void __clrcall class::Prepare(class System::String ^)" (?Prepare@class@@$$FQ$AAMXP$AAVString@System@@@Z) already defined in Myproject.obj Where could I do wrong?

thak you for advice What book you recomend?

I need open new form and close that form, from wich it was opened. How to do it?

what do you mean saying "double-buffering" ? -- modified at 10:39 Tuesday 13th March, 2007 I find out what is double-buffering, and added. It really helped. Tank you all for your help.

private: System::Void tmr_for_move_Tick(System::Object^ sender, System::EventArgs^ e) { Move_usr(); if(b_usr.pct->Visible == true) Move_bl_usr(); for(int i=0; ipct->Visible == true) Move_bl_em(i); if(b_usr.pct->Visible == true) Check_hit_em(i); if(b_em[i]->pct->Visible == true) Check_hit_usr(i); else if(em[i]->pct->Visible == true) Shooting_em(i); } } private: void Move_em(int i){ if(em[i]->pct->Left + em[i]->step_x > min_x && em[i]->pct->Left + em[i]->step_x < max_x) em[i]->pct->Left += em[i]->step_x; else em[i]->step_x *= -1; if(em[i]->pct->Top + em[i]->step_y > min_y && em[i]->pct->Top + em[i]->step_y <= max_y) em[i]->pct->Top += em[i]->step_y; else em[i]->step_y *= -1; if(em[i]->pct->Left == max_x) em[i]->step_x = - em[i]->step_x; if(em[i]->pct->Top == max_y - 58) em[i]->step_y = - em[i]->step_y; if(em[i]->step_x > 0) em[i]->pct->Load("e_r.jpg"); else if(em[i]->step_x < 0) em[i]->pct->Load("e_l.jpg"); if(em[i]->step_y > 0) em[i]->pct->Load("e_d.jpg"); else if(em[i]->step_y < 0) em[i]->pct->Load("e_u.jpg"); } Other procedures are same, but move different object. private: object usr, b_usr; private: static unsigned short int hits = 0; private: static unsigned short int n = 10; private: static unsigned short int m = 32; private: static array^ em; private: static array^ b_em; ref struct object { int step_x, step_y; System::Windows::Forms::PictureBox^ pct; };

I use two picturebox's arrays, wich have 10 elenemts, two timers. My form is maximized and transparent. Then the form wasn't trasnparent, program was going on the right speed.

I had written my program, but it work so slow, that all work looks like one big photo album. I tried optimizate with visual studio, but it gave nothig. What could I do to increse program working speed?

thank you for your help :)

I need to create an 2 dimension array, wich type is picture box, so I have write such code: private: static unsigned short int n = 100; private: static array < System::Windows::Forms::PictureBox^ >^ m; m = gcnew array < System::Windows::Forms::PictureBox^ > (n); for(int i=0; i < n; i++){ m[i] = gcnew array < System::Windows::Forms::PictureBox^ >(n); for( int j = 0; j < n; j++){ m[i, j] = gcnew System::Windows::Forms::PictureBox(); m[i, j]->Location = System::Drawing::Point(200 + i, 250); m[i, j]->Visible = true; m[i, j]->Size = System::Drawing::Size(1, 1); m[i, j]->SizeMode = System::Windows::Forms::PictureBoxSizeMode::StretchImage; m[i, j]->Load("a.gif"); Controls->Add(m[i, j]); } } but i get an error, that this array is not 2 dimension what can be wrong?

then how create setup? I use visual studio c++ 2005 express edition.

I had finished my project and I want give to my frien. How should I biuld my project, that it work at my friend computer (he don't have .Net framework)?

thank you for your help :)

Here is all code : #pragma once namespace Littletanks { ref struct tank { int step_x, step_y; System::Windows::Forms::PictureBox^ pct; }; using namespace System; using namespace System::ComponentModel; using namespace System::Collections; using namespace System::Windows::Forms; using namespace System::Data; using namespace System::Drawing; public ref class wnd_main : public System::Windows::Forms::Form { public: wnd_main(void) { InitializeComponent(); } protected: ~wnd_main() { if (components) delete components; } private: System::ComponentModel::IContainer^ components; private: int max_x, max_y, min_x, min_y; private: tank usr, b_usr; private: static array^ em; private: static array^ b_em; #pragma region Windows Form Designer generated code void InitializeComponent(void) { this->components = (gcnew System::ComponentModel::Container()); this->usr.pct = (gcnew System::Windows::Forms::PictureBox()); this->b_usr.pct = (gcnew System::Windows::Forms::PictureBox()); this->SuspendLayout(); // // pct_usr // this->usr.pct->Location = System::Drawing::Point(235, 391); this->usr.pct->Size = System::Drawing::Size(50, 50); this->usr.pct->TabStop = false; // // pct_em // array^ em = gcnew array(10); array^ b_em = gcnew array(10); for(int i=0; i <10; i++){ this->em[i]->pct = gcnew System::Windows::Forms::PictureBox(); this->em[i]->pct->Location = System::Drawing::Point(250, 250); this->em[i]->pct->Visible = true; this->em[i]->pct->Size = System::Drawing::Size(50, 50); this->b_em[i]->pct = gcnew System::Windows::Forms::PictureBox(); this->b_em[i]->pct->Load("b_em[i]->jpg"); this->b_em[i]->pct->Location = System::Drawing::Point(13, 64); this->b_em[i]->pct->Size = System::Drawing::Size(5, 5); this->b_em[i]->pct->Visible = false; this->Controls->Add(this->b_em[i]->pct); this->Controls->Add(this->em[i]->pct); } this->b_usr.pct->Load("b_usr.jpg"); this->b_usr.pct->Location = System::Drawing::Point(97, 142); this->b_usr.pct->Size = System::Drawing::Size(5, 5); this->b_usr.pct->Visible = false; // wnd_main // this->AutoScaleDimensions = System::Drawing::SizeF(6, 13); this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font; this->BackColor = System::Drawing::SystemColors::Window; this->ClientSize = System::Drawin

I wrote taht you had sad, but still at same line is that error

the em array defined so : static array^ em; and tank is structure : ref struct tank { int step_x, step_y; System::Windows::Forms::PictureBox^ pct; }; What do you mean saying to create objects for array?:)

I had written : for(int i=0; i <10; i++){ em[i]->pct = (gcnew System::Windows::Forms::PictureBox()); em[i]->pct->Location = System::Drawing::Point(250, 250); em[i]->pct->Visible = true; em[i]->pct->Size = System::Drawing::Size(50, 50); } And I got this error :

An unhandled exception of type 'System.NullReferenceException' occurred in Little tanks.exe

Additional information: Object reference not set to an instance of an object.

at this line : em[i]->pct = (gcnew System::Windows::Forms::PictureBox()); what did I do wrong?

thanks for your help:)

I had written a program and I need use Random class, so I wrote : Random^ i = gcnew Random(); for(int i=0; i<10; i++) { em[i]->pct->Left = i->Next(min_x, max_x); em[i]->pct->Top = i->Next(min_y, max_y); } em is static array< tank^ >^ em; and tank is : ref struct tank { int step_x, step_y; System::Windows::Forms::PictureBox^ pct; }; but I get an error : error C2227: left of '->Next' must point to class/struct/union/generic type type is 'int' Where is problem??