CHAR 和 WCHAR 的 区别..

[ufdxkm]

#include <windows.h>


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

HINSTANCE hInst;

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,
				   int iCmdShow)
{

	MSG msg;
	HWND hwnd;

	WNDCLASS wc;


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

	if(! RegisterClass( &wc ))
	{
		MessageBox(NULL,TEXT("必须运行在Windows NT 系统下!"),TEXT("错误"),MB_OK);
		return 0;
	}

	hwnd = CreateWindow( TEXT("GenericAppClass"),
		TEXT("Generic Application"),
		WS_OVERLAPPEDWINDOW|WS_CLIPCHILDREN,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		300,
		400,
		NULL,
		NULL,
		hInstance,
		NULL
		);

	ShowWindow( hwnd, iCmdShow);

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

	return (int)msg.wParam;
}

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

	static HGLOBAL hResource;
	static char *pText;          //这个声明为WCHAR 的话. 滚动条就不能用了.
	HDC hdc;
	PAINTSTRUCT ps;
	static int iNumLines,ivos;
	TEXTMETRIC tm;
	static int cxChar,cyChar,cxClient,cyClient,xScroll;
	RECT rect;
	static HWND hScroll;


	switch(message)
	{



	case WM_CREATE:

		hdc = GetDC (hwnd) ;
		GetTextMetrics (hdc, &tm) ;
		cxChar = tm.tmAveCharWidth ;
		cyChar = tm.tmHeight + tm.tmExternalLeading ;
		ReleaseDC (hwnd, hdc) ;

		xScroll = GetSystemMetrics (SM_CXVSCROLL) ;

		hScroll = CreateWindow (TEXT ("scrollbar"), NULL,
			WS_CHILD | WS_VISIBLE | SBS_VERT,
			0, 0, 0, 0,
			hwnd, (HMENU) 1, hInst, NULL) ;


		SetScrollRange (hScroll, SB_CTL, 0, 100, FALSE) ;
		SetScrollPos   (hScroll, SB_CTL, 0, FALSE) ;
		return 0 ;


	case WM_SIZE:


		MoveWindow (hScroll, LOWORD (lParam) - xScroll, 0,
			xScroll, cyClient = HIWORD (lParam), TRUE) ;
		SetFocus (hwnd) ;
		return 0 ;



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


		GetClientRect (hwnd, &rect) ;
		rect.left += cxChar ;
		rect.top  += cyChar * (1 - ivos) ;
		DrawTextA (hdc, TEXT("test...............\
							 .........................\
							 ...........................\
							 ......................\
							 .........................\
							 ............."), -1, &rect, DT_EXTERNALLEADING) ;

		EndPaint (hwnd, &ps) ;
		return 0 ;


	case WM_VSCROLL :
		switch (wParam)
		{
		case SB_TOP :
			ivos = 0 ;
			break ;
		case SB_BOTTOM :
			ivos = 100 ;
			break ;
		case SB_LINEUP :
			ivos -= 1 ;
			break ;
		case SB_LINEDOWN :
			ivos += 1 ;
			break ;
		case SB_PAGEUP :
			ivos -= cyClient / cyChar ;
			break ;
		case SB_PAGEDOWN :
			ivos += cyClient / cyChar ;
			break ;
		case SB_THUMBPOSITION :
			ivos = LOWORD (lParam) ;
			break ;
		}
		ivos = max (0, min (ivos, 100)) ;

		if (ivos != GetScrollPos (hScroll, SB_CTL))
		{
			SetScrollPos (hScroll, SB_CTL, ivos, TRUE) ;
			InvalidateRect (hwnd, NULL, TRUE) ;
		}
		return 0 ;

	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;

	}

	return DefWindowProc(hwnd,message,wParam,lParam);
}

我简化成了一个可以直接编译的代码.. WCHAR 和 CHAR 怎么会影响到滚动条呢.有人帮我理解下吗. 谢谢!

[I_NBFA]

能滚动啊, 我这可以.
WCHAR是宽字节, 每个字符2字节, char是1字节.

[用户 昵称]

char是8个bit，wchar是16个bit。

[ufdxkm]

刚刚重新打开了下IDE又可以了...晕啊.

[动起手来实现白日梦]

W----unicode
A----ANSI

[ufdxkm]

我的问题是 WCHAR 的时候. 滚动条不能用了. 但是现在可以了...

[healer_kx]

sizeof(char)
sizeof(WCHAR)
试一试呗~