I have created a "Hello World" win32 application that is a GUI application. However, I don't understand how "Hello World" is printed inside the code. I created the application using Microsoft Visual Studio version 6 (even though you may not advise to me to do so). Any suggestions on how "Hello World" is printed in the window? I have looked on google also, but can't seem to find an answer that I understand (i.e. the descriptions aren't clear enough for me). Thanks.
it is windows programming - a lot of code to make a simplest thing
go to the WndProc function - this function is called by windows in case of any event occured for the main window of the program
these two lines at the beginning of the function load string "Hello, world" from resources of the exe (just in case)Code:TCHAR szHello[MAX_LOADSTRING]; LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
then go down to
case WM_PAINT:
this event notifies the application, that something was changed on the internal area (client rectangle) of the window and its content should be redrawn
Application retreives handle of the aray and using
function draws the text loaded above in the specified location of the client area of the windowCode:DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);
All problems in computer science can be solved by another level of indirection,
except for the problem of too many layers of indirection.
– David J. Wheeler
So if I want the program to print something else, would that imply that I would have to first load the custom text into the resources of the exe?
Not nessasery, but it is good practice to store all visible to enduser strings into resourses, so they could be reviewed by technical writer and translated easely into different language
But in a sample program you can initialize the hello buffer directly instead of reading from resources
All problems in computer science can be solved by another level of indirection,
except for the problem of too many layers of indirection.
– David J. Wheeler
I may look back into windows programming later. It's a lot of information to absorb since I have been more accustomed to C/C++ style programming. I mainly want to make a program (either windows app or console app) that would perform event driven actions according to some flow charts that I have drafted.
