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* gcc.sgml: Remove outdated "WinMainCRTStartup" references. Add a hellogui.c example

This commit is contained in:
Joshua Daniel Franklin 2003-04-26 14:10:59 +00:00
parent a5035abfac
commit 3c7197b104
2 changed files with 92 additions and 11 deletions
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5
winsup/doc/ChangeLog
View File

@ -1,3 +1,8 @@
2003-04-26 Joshua Daniel Franklin <joshuadfranklin@yahoo.com>
* gcc.sgml: Remove outdated "WinMainCRTStartup" references. Add a
hellogui.c example.
2003-03-26 Joshua Daniel Franklin <joshuadfranklin@yahoo.com>
* setup-net.sgml: Make suggested additions to setup.exe documentation

98
winsup/doc/gcc.sgml
View File

@ -38,17 +38,6 @@ int
foo (int i)
</screen>
<para>For most cases, you can just remove the __export and leave it at
that. For convenience sake, you might want to include the following
code snippet when compiling GUI programs. If you don't, you will want
to add "-e _mainCRTStartup" to your link line in your Makefile.</para>
<screen>
#ifdef __CYGWIN__
WinMainCRTStartup() { mainCRTStartup(); }
#endif
</screen>
<para>The Makefile is similar to any other UNIX-like Makefile,
and like any other Cygwin makefile. The only difference is that you use
<command>gcc -mwindows</command> to link your program into a GUI
@ -74,5 +63,92 @@ handle Windows resource files directly, we maintain the
<filename>.res</filename> naming convention. For more information on
<filename>windres</filename>, consult the Binutils manual. </para>
<para>
The following is a simple GUI-mode "Hello, World!" program to help
get you started:
<screen>
/*-------------------------------------------------*/
/* hellogui.c - gui hello world */
/* build: gcc -mwindows hellogui.c -o hellogui.exe */
/*-------------------------------------------------*/
#include &lt;windows.h&gt;
char glpszText[1024];
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
sprintf(glpszText,
"Hello World\nGetCommandLine(): [%s]\n"
"WinMain lpCmdLine: [%s]\n",
lpCmdLine, GetCommandLine() );
WNDCLASSEX wcex;
wcex.cbSize = sizeof(wcex);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "HELLO";
wcex.hIconSm = NULL;
if (!RegisterClassEx(&amp;wcex))
return FALSE;
HWND hWnd;
hWnd = CreateWindow("HELLO", "Hello", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
if (!hWnd)
return FALSE;
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
MSG msg;
while (GetMessage(&amp;msg, NULL, 0, 0))
{
TranslateMessage(&amp;msg);
DispatchMessage(&amp;msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hWnd, &amp;ps);
RECT rt;
GetClientRect(hWnd, &amp;rt);
DrawText(hdc, glpszText, strlen(glpszText), &amp;rt, DT_TOP | DT_LEFT);
EndPaint(hWnd, &amp;ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
</screen>
</para>
</sect2>
</sect1>