Introduction
This is a step by step guide to setting the values in the MSChart control using an array of values.
Step 1 : Creating the Project
Start Visual C++ en create a simple dialog based application labeled "Graph"
Step 2 : Add the MSChart OCX to Your Project
Select "project menu" option and select "Components and contols" and then choose the MSChart component en click "add"
Step 3 : Add the MSChart OCX to Your Dialog
Select resources view tab en open the main dialog (It’s a simple dialog based application). Drop the OCX on your dialog.
Now, label your Chart "IDC_MSCAHRT1"
Now, choose menu option "Classwizard" to create a member variable of your chart labeled "m_Chart"
Step 4: Add the Code
Now add a button labeled "Go" to your dialog. Double click it to edit the code and add the following code in the
On_Go function:
COleSafeArray saRet;
DWORD numElements[] = {10, 10};
saRet.Create(VT_R8, 2, numElements);
long index[2];
for(index[0]=0; index[0]<10; index[0]++) {
for(index[1]=0; index[1]<10; index[1]++) {
double val = index[0] + index[1]*10;
saRet.PutElement(index, &val);
}
}
m_Chart.SetChartData(saRet.Detach());
m_Chart.Refresh;
Step 5: Building and Running the Application
Build and execute your app, then click the "Go" button. Here is the result:
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