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#2
有容就大2012-02-22 12:24
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程序代码：#include <windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR iCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("Draw a point!");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hInstance = hInstance;
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.lpszClassName = szAppName;
wndclass.lpszMenuName = NULL;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires windows NT!"), szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow (szAppName, TEXT("One Point"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
if(hwnd == NULL)
{
MessageBox(NULL, TEXT("No more memory for CreateWindow!"), szAppName, MB_ICONERROR);
return 0;
}
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxClient, cyClient;
HDC hdc;
PAINTSTRUCT ps;
int i;
switch (message)
{
case WM_CREATE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
MoveToEx(hdc, 0, cyClient/2, NULL);
LineTo(hdc,cxClient, cyClient/2);
MoveToEx(hdc, cxClient/2, 0, NULL);
LineTo(hdc, cxClient/2, cyClient);
EndPaint(hwnd,&ps);
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
这个是画个十字交叉的两条直线的程序，运行后屏幕一闪而过？LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR iCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("Draw a point!");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hInstance = hInstance;
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.lpszClassName = szAppName;
wndclass.lpszMenuName = NULL;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires windows NT!"), szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow (szAppName, TEXT("One Point"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
if(hwnd == NULL)
{
MessageBox(NULL, TEXT("No more memory for CreateWindow!"), szAppName, MB_ICONERROR);
return 0;
}
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxClient, cyClient;
HDC hdc;
PAINTSTRUCT ps;
int i;
switch (message)
{
case WM_CREATE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
MoveToEx(hdc, 0, cyClient/2, NULL);
LineTo(hdc,cxClient, cyClient/2);
MoveToEx(hdc, cxClient/2, 0, NULL);
LineTo(hdc, cxClient/2, cyClient);
EndPaint(hwnd,&ps);
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
“画点004.exe”: 已加载“D:\project\C++\画点004\Debug\画点004.exe”，已加载符号。
“画点004.exe”: 已加载“C:\WINDOWS\system32\ntdll.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\kernel32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\user32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\gdi32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\msvcr100d.dll”，已加载符号。
“画点004.exe”: 已加载“C:\WINDOWS\system32\imm32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\advapi32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\rpcrt4.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\secur32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\lpk.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\usp10.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\uxtheme.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\msvcrt.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\Program Files\360\360Safe\safemon\safemon.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\shell32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\shlwapi.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\ole32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\oleaut32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\msvcp60.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\wininet.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\crypt32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\msasn1.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\psapi.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\ws2_32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\ws2help.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\version.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\WinSxS\x86_Microsoft.\comctl32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\comctl32.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\MSCTF.dll”，Cannot find or open the PDB file
“画点004.exe”: 已加载“C:\WINDOWS\system32\msctfime.ime”，Cannot find or open the PDB file
程序“[3320] 画点004.exe: 本机”已退出，返回值为 0 (0x0)。
什么原因，怎么弄。