Question

C++创建窗口。使用windows api 。用c++ 编译。

#include <windows.h>
#include <iostream>
#include <string>

using namespace std;

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
static TCHAR szAppName[] = TEXT ( "HelloWin ") ;
HWND hwnd ;
MSG msg ;

LPCTSTR szStr="another";

GetModuleHandle(0);

//MessageBox(NULL,szStr,szStr,MB_OK);

WNDCLASSEX wndclass;

wndclass.cbSize = 32;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) COLOR_WINDOW+1;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szStr ;
wndclass.hIconSm = NULL;

RegisterClassEx(&wndclass);

hwnd=CreateWindowEx(WS_EX_CLIENTEDGE,szStr,szStr,WS_EX_OVERLAPPEDWINDOW,100,100,600,400,NULL,NULL,hInstance,NULL);

ShowWindow(hwnd,SW_SHOW);
UpdateWindow(hwnd);

//退出程序
//ExitProcess(0);
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;
PAINTSTRUCT ps ;
RECT rect ;

switch (message)
{
case WM_CREATE:

return 0 ;

case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;

GetClientRect (hwnd, &rect) ;

DrawText (hdc, TEXT ( "Hello, WindowsXP! "), -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;

EndPaint (hwnd, &ps) ;
return 0 ;

case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}

Answer 1

#include <windows.h>

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
static TCHAR szAppName[] = TEXT ( "HelloWin ") ;
HWND hwnd ;
MSG msg ;

LPCTSTR szStr="another";

GetModuleHandle(0);

//MessageBox(NULL,szStr,szStr,MB_OK);

WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) COLOR_WINDOW+1;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szStr ;

if(!RegisterClass(&wndclass)){return 0;};

hwnd=CreateWindowEx(WS_EX_CLIENTEDGE,szStr,szStr,WS_EX_OVERLAPPEDWINDOW,100,100,600,400,NULL,NULL,hInstance,NULL);

ShowWindow(hwnd,SW_SHOW);
UpdateWindow(hwnd);

while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{

switch (message)
{
case WM_CREATE:

return 0 ;

case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}

Answer 2

#include <windows.h>
#include <iostream>
#include <string>

using namespace std;

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
static TCHAR szAppName[] = TEXT ( "HelloWin ") ;
HWND hwnd ;
MSG msg ;

LPCTSTR szStr="another";

GetModuleHandle(0);

//MessageBox(NULL,szStr,szStr,MB_OK);

WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) COLOR_WINDOW+1;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szStr ;

RegisterClass(&wndclass);

hwnd=CreateWindowEx(WS_EX_CLIENTEDGE,szStr,szStr,WS_EX_OVERLAPPEDWINDOW,100,100,600,400,NULL,NULL,hInstance,NULL);

ShowWindow(hwnd,SW_SHOW);
UpdateWindow(hwnd);

while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}

//退出程序
//ExitProcess(0);
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc ;
PAINTSTRUCT ps ;
RECT rect ;

switch (message)
{
case WM_CREATE:

return 0 ;

case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;

GetClientRect (hwnd, &rect) ;

DrawText (hdc, TEXT ( "Hello, WindowsXP! "), -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;

EndPaint (hwnd, &ps) ;
return 0 ;

case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}

Answer 3

。。。。
问题是？
简单创建一个窗口，有什么难的？