Hi,

I have written a windows forms application to capture the position of joystick and give force feedback to it.

I can read the joystick state information but I am not able to give force feedback to it. I have included the code for the form below. Can anyone please point out the mistake / problem.

Thanks in advance

Sumit

#pragma once

#using <mscorlib.dll>

#using <system.dll>

#using <system.drawing.dll>

namespace ManagedJoystick {

using namespace System;

using namespace System::ComponentModel;

using namespace System::Collections;

using namespace System::Windows::Forms;

using namespace System::Data;

using namespace System::Drawing;

using namespace System::Timers;

using namespace Microsoft::DirectX;

using namespace Microsoft::DirectX::DirectInput;

/// <summary>

/// Summary for Form1

///

/// WARNING: If you change the name of this class, you will need to change the

/// 'Resource File Name' property for the managed resource compiler tool

/// associated with all .resx files this class depends on. Otherwise,

/// the designers will not be able to interact properly with localized

/// resources associated with this form.

/// </summary>

public ref class Form1 : public System::Windows::Forms::Form

public:

Form1(void)

//

//TODO: Add the constructor code here

//

// Create force feedback capable joystick device

for each(DeviceInstance di in Manager::GetDevices(DeviceClass::GameControl, EnumDevicesFlags::ForceFeeback))

device = gcnew Device(di.InstanceGuid);

//MessageBox::Show("Yahoo!!!!! Joystick found");

break;

if(device == nullptr)

// Error notification if joystick is not found

MessageBox::Show("No joystick found");

// Set data format

// Set Cooperative level

device->SetCooperativeLevel(this, CooperativeLevelFlags::Exclusive | CooperativeLevelFlags::Background);

// Set axis mode absolute

device->Properties->AxisModeAbsolute = true;

//Acquire joystick for capturing

// Configure axes

for each (DeviceObjectInstance ^doi in device->Objects)

// Set axes range

if((doi->ObjectId) && (int)DeviceObjectTypeFlags::Axis != 0)

// Temporary variable

array<int> ^temp;

// Get info about first two FF axii on the device

if((doi->Flags & (int)ObjectInstanceFlags::Actuator) != 0)

if(axis != nullptr)

temp = gcnew array<int,1> (axis->Length +1);

else

axis = gcnew array<int, 1> (1);

// Store the offset of each axis

if(axis->Length == 2)

break;

protected:

/// <summary>

/// Clean up any resources being used.

/// </summary>

if (components)

delete components;

private: System::ComponentModel::IContainer^ components;

protected:

private:

/// <summary>

/// Required designer variable.

/// </summary>

private: System::Windows::Forms::Button^ button1;

private: System::Windows::Forms::Label^ labelX;

private: System::Windows::Forms::Label^ labelY;

private: System::Windows::Forms::Label^ label1;

private: System::Windows::Forms::Label^ label2;

private: System::Windows::Forms::Timer^ timer1;

private: System::Windows::Forms::Label^ label3;

private: System::Windows::Forms::Label^ labelZ;

array<int> ^axis;

#pragma region Windows Form Designer generated code

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

void InitializeComponent(void)

this->components = (gcnew System::ComponentModel::Container());

this->button1 = (gcnew System::Windows::Forms::Button());

this->labelX = (gcnew System::Windows::Forms::Label());

this->labelY = (gcnew System::Windows::Forms::Label());

this->label1 = (gcnew System::Windows::Forms::Label());

this->label2 = (gcnew System::Windows::Forms::Label());

this->timer1 = (gcnew System::Windows::Forms::Timer(this->components));

this->label3 = (gcnew System::Windows::Forms::Label());

this->labelZ = (gcnew System::Windows::Forms::Label());

this->SuspendLayout();

//

// button1

//

this->button1->Location = System::Drawing::Point(128, 104);

this->button1->Name = L"button1";

this->button1->Size = System::Drawing::Size(75, 23);

this->button1->TabIndex = 0;

this->button1->Text = L"button1";

this->button1->UseVisualStyleBackColor = true;

this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);

//

// labelX

//

this->labelX->AutoSize = true;

this->labelX->Location = System::Drawing::Point(39, 184);

this->labelX->Name = L"labelX";

this->labelX->Size = System::Drawing::Size(35, 13);

this->labelX->TabIndex = 1;

this->labelX->Text = L"label1";

//

// labelY

//

this->labelY->AutoSize = true;

this->labelY->Location = System::Drawing::Point(148, 184);

this->labelY->Name = L"labelY";

this->labelY->Size = System::Drawing::Size(35, 13);

this->labelY->TabIndex = 2;

this->labelY->Text = L"label2";

//

// label1

//

this->label1->AutoSize = true;

this->label1->Location = System::Drawing::Point(42, 154);

this->label1->Name = L"label1";

this->label1->Size = System::Drawing::Size(14, 13);

this->label1->TabIndex = 3;

this->label1->Text = L"X";

//

// label2

//

this->label2->AutoSize = true;

this->label2->Location = System::Drawing::Point(151, 154);

this->label2->Name = L"label2";

this->label2->Size = System::Drawing::Size(14, 13);

this->label2->TabIndex = 4;

this->label2->Text = L"Y";

//

// timer1

//

this->timer1->Tick += gcnew System::EventHandler(this, &Form1::timer1_Tick);

//

// label3

//

this->label3->AutoSize = true;

this->label3->Location = System::Drawing::Point(240, 154);

this->label3->Name = L"label3";

this->label3->Size = System::Drawing::Size(14, 13);

this->label3->TabIndex = 5;

this->label3->Text = L"Z";

//

// labelZ

//

this->labelZ->AutoSize = true;

this->labelZ->Location = System::Drawing::Point(243, 184);

this->labelZ->Name = L"labelZ";

this->labelZ->Size = System::Drawing::Size(35, 13);

this->labelZ->TabIndex = 6;

this->labelZ->Text = L"label4";

//

// Form1

//

this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);

this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;

this->ClientSize = System::Drawing::Size(292, 273);

this->Controls->Add(this->labelZ);

this->Controls->Add(this->label3);

this->Controls->Add(this->label2);

this->Controls->Add(this->label1);

this->Controls->Add(this->labelY);

this->Controls->Add(this->labelX);

this->Controls->Add(this->button1);

this->Name = L"Form1";

this->Text = L"Form1";

this->ResumeLayout(false);

this->PerformLayout();

#pragma endregion

private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {

//// Display some samples

//MessageBox::Show(Convert::ToString(joystickState->X));

//MessageBox::Show(Convert::ToString(joystickState->Y));

timer1->Enabled = true;

private: System::Void timer1_Tick(System::Object^ sender, System::EventArgs^ e) {

// Poll the device

// Get joystick state

// Display the data

for each(EffectInformation ^ei in device->GetEffects(EffectType::All))

// If joystick supports constant force then apply it

if(DInputHelper::GetTypeCode(ei->EffectType) == (int)EffectType::ConstantForce)

// Fill some generic values for effect

eff = gcnew Effect();

eff->SetDirection(gcnew array<int,1> (axis->Length));

eff->SetAxes(gcnew array<int,1> (axis->Length));

eff->ConditionStruct = gcnew array<Condition,1> (axis->Length);

eff->Duration = (int)DI::Infinite;

eff->TriggerButton = (int)Microsoft::DirectX::DirectInput::Button::NoTrigger;

eff->TriggerRepeatInterval = (int)DI::Infinite;

// Create the effect using passed guid

effObj = gcnew EffectObject(ei->EffectGuid, *eff, device);

if (effObj == nullptr)

MessageBox::Show("ConstantForce is not supported.");