Teach Yourself Borland C++ in 14 Days - portal

254 Day 7
NOTE
1. Choose Edit | Cut from the main menu. The Code Editor comes to the top, and
the EditCutClick() event handler is displayed.
2. Type the following at the cursor:
Memo->CutToClipboard();
And that’s all there is to that particular menu item! You may not fully realize it, but VCL does
a lot for you behind the scenes. The whole idea of a framework is to take the burden of the
low-level details off the programmer’s back. Life is good.
One of the interesting aspects of a program like C++Builder is that you rarely view your
program as a whole. C++Builder conveniently takes you to the section of code you need to
work on to deal with a particular event, so you usually only see your program in small chunks.
Listing 7.1 contains the header for the ScratchPad program up to this point. The header is
entirely C++Builder generated. The entire SPMAIN.CPP program is shown in Listing 7.2.
Follow the examples you’ve just worked through to write code for each of the remaining
menu items. Copy the code for each of the menu OnClick handlers from Listing 7.2. (The
comment lines are there to explain to you what the code is doing. You don’t have to include
them when you type the code.)
Listing 7.1. SPMAIN.H.
The event handlers appear in the source file in the order in which they
were created. Don’t be concerned if the order of the event handlers in
your source file does not exactly match Listing 7.2. The order in which
the functions appear makes no difference to the compiler.
1: //------------------------------------------------------------
2: #ifndef SPMainH
3: #define SPMainH
4: //------------------------------------------------------------
5: #include
6: #include
7: #include
8: #include
9: #include
10: #include
11: #include
12: #include
13: #include
14: //------------------------------------------------------------
15: class TScratchPad : public TForm
16: {