C#

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Down)
    {
        MessageBox.Show("Pressed");
    }
}

Mohammad Dayyan wrote:

but when I press Key.Down

ricmil42 wrote:

Are you clicking a button or pressing a keyboard key?

Henry Minute wrote:

If you change your code to if (e.KeyCode == Keys.K), for example, and test it you will find that the event does fire.

const int CAPACITY=1000;
StringBuilder sb=new StringBuilder(CAPACITY);
NativeFunction(sb, sb.Capacity, ...);
string result=sb.ToString();

[DllImport...] static extern void NativeFunction(string textBuffer, int textBufferSize, ...);

void NativeFunction(char* textBuffer, int textBufferSize, ...) {...}

[DllImport("mclmcrrt710.dll", EntryPoint = "mclInitializeApplication_proxy")]
static extern bool InitiateMatlabApplication(string options, Int32 count);

bool result = InitiateMatlabApplication(null, 0);

[DllImport("MatlabModel.dll", EntryPoint = "MatlabModelInitialize")]
static extern bool InitiateMatlabModel();

bool result = InitiateMatlabModel();

[DllImport("MatlabModel.dll", EntryPoint = "mlfInitializeProject")]
static extern bool InitializeProject(IntPtr RootDir,
                                     IntPtr Name);

[DllImport("mclmcrrt710.dll", EntryPoint = "mxCreateString_proxy", CharSet = CharSet.Ansi)]
static extern IntPtr CreateString([In][MarshalAs(UnmanagedType.LPStr)] string myString);

IntPtr ptrLocation = CreateString(strProjectLocation);
IntPtr ptrName = CreateString(Settings.ProjectName);

result = InitializeProject(ptrLocation, ptrName);

[DllImport("MatlabModel.dll", EntryPoint = "mlfGetNofSteps")]

IntPtr result_ptr = IntPtr.Zero;
bool result = GetNofSteps(1, ref result_ptr)

[DllImport("mclmcrrt710.dll", EntryPoint = "mxGetScalar_proxy")]
static extern double GetScalar(IntPtr mxArray);

int NumberOfSteps = Convert.ToInt32(GetScalar(result_ptr));

[DllImport("MatlabModel.dll", EntryPoint = "mlfmyFunction")]
static extern bool myFunction(int nargout,
ref IntPtr ptrResultMatrix1,
ref IntPtr ptrResultMatrix2,
ref IntPtr ptrResultMatrix3,
IntPtr ptrSTep);

[DllImport("mclmcrrt710.dll", EntryPoint = "mxCreateDoubleMatrix_700_proxy")]
static extern IntPtr CreateDoubleMatrix(int cols, int rows, int flags);

// Create output BergingEindProc
IntPtr ptrResultMatrix1 = CreateDoubleMatrix(10, 1, 0);
IntPtr ptrResultMatrix2 = CreateDoubleMatrix(10, 1, 0);
IntPtr ptrResultMatrix3 = CreateDoubleMatrix(10, 1, 0);

// Create input ptrStapDag
double[] value = new double[1];
value[0] = Convert.ToDouble(DayStep);
IntPtr ptrStapDag = CreateDoubleMatrix(1, 1, 0);
IntPtr value_ptr = GetPtr(ptrStep);
Marshal.Copy(value, 0, value_ptr, 1);

bool result = myFunction(3, ref ptrResultMatrix1, ref ptrResultMatrix2,
ref ptrResultMatrix3, ptrStep);