在学API时，练习时有一个错误，总是检测不出来，帮忙下呗，谢谢！

[Eveilei]

# include <windows.h>
LRESULT CALLBACK WndProc (HWND,UINT,WPARAM,LPARAM);
int WINAPI WinMain (HINSTANCE hInstance,HINSTANCE hPrevInstance,
PSTR szCMDLine,int iCmdShow)

{
static TCHAR szAppName[] = TEXT ("Bezier");
HWND hwnd;
MSG msg;
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) GetStockObject (WHITE_BRUSH);
wndclass.lpszMenuName =NULL;
wndclass.lpszClassName =szAppName;

if (!RegisterClass(&wndclass))
{
MessageBox (NULL,TEXT("This program requires Windows NT !"),
szAppName,MB_ICONERROR);
return 0;
}
hwnd =CreateWindow (szAppName,
TEXT ("Bezier Splines"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
ShowWindow (hwnd,iCmdShow);
UpdateWindow (hwnd);
while (GetMessage (&msg,NULL,0,0))
{
TranslateMessage (&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
void DrawBezier(HDC hdc,POINT apt[])
{
PolyBezier(hdc,apt,4);
MoveToEx(hdc,apt[0].x,apt[0].y,NULL);
LineTo (hdc,apt[1].x,apt[1].y);
MoveToEx(hdc,apt[2].x,apt[2].y,NULL);
LineTo (hdc,apt[3].x,apt[3].y);
}
LRESULT CALLBACK WndProc (HWND hwnd,UINT message,WPARAM wParam,LPARAM IParam)
{
static POINT apt[4];
HDC hdc;
int cxClient,cyClient;
PAINTSTRUCT ps;

switch (message)
{
case WM_SIZE:
cxClient = LOWORD(IPararm);
cyClient = HIWORD(IPararm);
apt[0].x = cxClient/4;
apt[0].y = cyClient/2;
apt[1].x = cxClient/2;
apt[1].y = cyClient/4;
apt[2].x = cxClient/2;
apt[2].y = 3*cyClient/4;
apt[3].x = 3*cxClient/4;
apt[3].y = cyClient/2;
return 0;
case WM_LBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_MOUSEMOVE:
if(wParam & MK_LBUTTON ||wParam & MK_RBUTTON)
{
hdc = GetDC(hwnd);
SelectObject(hdc,GetStockObject(WHITE_PEN));
DrawBezier(hdc,apt);

if(wParam & MK_LBUTTON)
{
apt[1].x = LOWORD(IParam);
apt[1].y = HIWORD(IParam);
}
if(wParam & MK_RBUTTON)
{
apt[2].x = LOWORD(IParam);
apt[2].y = HIWORD(IParam);
}

SelectObject(hdc,GetStockObject(BLACK_PEN));
DrawBezier(hdc,apt);
ReleaseDC(hwnd,hdc);
}
return 0;


case WM_PAINT:
InvalidateRect(hwnd,NULL,TRUE);
hdc = BeginPaint(hwnd,&ps);
DrawBezier(hdc,apt);
EndPaint(hwnd,&ps);
return 0;

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

错误代码：D:\MFC\BEZIER\BEZIER.c(66) : error C2065: 'IPararm' : undeclared identifier

实在找不出来了，帮忙看下了，谢了！

我想多了解些VC++6.0编译器的用法以及一些常见错误调试方法，哪里有这方面的书或者教程啊，知道的告诉下呗，谢谢了！

[mstlq]

楼主请先把英语学好

[Eveilei]

[Quote=引用 6 楼 mstlq 的回复:]
楼主请先把英语学好
[/Quote]
好的。
我好长时间没学英语了，都退步了。大二下学期才过的英语六级。

[exy337]

[Quote=引用 1 楼 adlay 的回复:]
'IPararm'  拼写错误 IParam
[/Quote]
同上

[www_adintr_com]

'IPararm' 拼写错误 IParam

[la_feng]

# include <windows.h> 
LRESULT CALLBACK WndProc (HWND,UINT,WPARAM,LPARAM); 
int WINAPI WinMain (HINSTANCE hInstance,HINSTANCE hPrevInstance, 
PSTR szCMDLine,int iCmdShow) 

{ 
static TCHAR szAppName[] = TEXT ("Bezier"); 
HWND hwnd; 
MSG msg; 
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) GetStockObject (WHITE_BRUSH); 
wndclass.lpszMenuName =NULL; 
wndclass.lpszClassName =szAppName; 

if (!RegisterClass(&wndclass)) 
{ 
MessageBox (NULL,TEXT("This program requires Windows NT !"), 
szAppName,MB_ICONERROR); 
return 0; 
} 
hwnd =CreateWindow (szAppName, 
                TEXT ("Bezier Splines"), 
WS_OVERLAPPEDWINDOW, 
CW_USEDEFAULT, 
CW_USEDEFAULT, 
CW_USEDEFAULT, 
CW_USEDEFAULT, 
NULL, 
NULL, 
hInstance, 
NULL); 
ShowWindow (hwnd,iCmdShow); 
UpdateWindow (hwnd); 
while (GetMessage (&msg,NULL,0,0)) 
{ 
TranslateMessage (&msg); 
DispatchMessage(&msg); 
} 
return msg.wParam; 
} 
void DrawBezier(HDC hdc,POINT apt[]) 
{ 
PolyBezier(hdc,apt,4); 
MoveToEx(hdc,apt[0].x,apt[0].y,NULL); 
LineTo  (hdc,apt[1].x,apt[1].y); 
MoveToEx(hdc,apt[2].x,apt[2].y,NULL); 
LineTo  (hdc,apt[3].x,apt[3].y); 
} 
LRESULT CALLBACK WndProc (HWND hwnd,UINT message,WPARAM wParam,LPARAM IParam) 
{ 
static POINT apt[4]; 
HDC hdc; 
int cxClient,cyClient; 
PAINTSTRUCT ps; 

switch (message) 
{ 
case WM_SIZE: 
cxClient = LOWORD(IParam); 
cyClient = HIWORD(IParam); 
apt[0].x = cxClient/4; 
apt[0].y = cyClient/2; 
apt[1].x = cxClient/2; 
apt[1].y = cyClient/4; 
apt[2].x = cxClient/2; 
apt[2].y = 3*cyClient/4; 
apt[3].x = 3*cxClient/4; 
apt[3].y = cyClient/2; 
return 0; 
case WM_LBUTTONDOWN: 
case WM_RBUTTONDOWN: 
case WM_MOUSEMOVE: 
if(wParam & MK_LBUTTON ||wParam & MK_RBUTTON) 
{ 
hdc = GetDC(hwnd); 
SelectObject(hdc,GetStockObject(WHITE_PEN)); 
DrawBezier(hdc,apt); 

if(wParam & MK_LBUTTON) 
{ 
apt[1].x = LOWORD(IParam); 
apt[1].y = HIWORD(IParam); 
} 
if(wParam & MK_RBUTTON) 
{ 
apt[2].x = LOWORD(IParam); 
apt[2].y = HIWORD(IParam); 
} 

SelectObject(hdc,GetStockObject(BLACK_PEN)); 
DrawBezier(hdc,apt); 
ReleaseDC(hwnd,hdc); 
} 
return 0; 


case WM_PAINT: 
InvalidateRect(hwnd,NULL,TRUE); 
hdc = BeginPaint(hwnd,&ps); 
DrawBezier(hdc,apt); 
EndPaint(hwnd,&ps); 
return 0; 

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

cxClient = LOWORD(IPararm);
cyClient = HIWORD(IPararm); 跟你传的参数IParam不同，自己对照吧

[f2378]

cxClient = LOWORD(IPararm);
cyClient = HIWORD(IPararm);
应该是IParam

[loveour]

wParam的w本意是word，在16位版本的windows中这是一个word，lParam的l本意是long，这个参数当时是32位。只是，到了32位windows两个都是32位了。通常，w传递句柄和参数，l传递指针。

[wanjingwei]

楼主要会看错误提示呀，都写很清楚了