#include <windows.h>
struct
{
int iStyle;
TCHAR* szText;
}
button[] =
{
BS_DEFPUSHBUTTON, TEXT("1"),
BS_DEFPUSHBUTTON, TEXT("2"),
BS_DEFPUSHBUTTON, TEXT("3"),
BS_DEFPUSHBUTTON, TEXT("4"),
BS_DEFPUSHBUTTON, TEXT("5"),
BS_DEFPUSHBUTTON, TEXT("6"),
};
#define NUM (sizeof button / sizeof button[0])
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK WndProcChild(HWND, UINT, WPARAM, LPARAM);
WNDCLASSA wndclasschild;
TCHAR szAppNameChild[] = TEXT("zichuamhkou");
static TCHAR szAppName[] = TEXT("window1");
static TCHAR szAppNameButton[] = TEXT("button");
WNDCLASS wndclass;
WNDCLASS wndchild;
MSG msgchild;
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
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;
wndchild = wndclass;
wndchild.lpfnWndProc = WndProcChild;
wndchild.hInstance = hInstance;
wndchild.lpszClassName = szAppNameChild;
wndchild.lpszMenuName = (HMENU)234;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("fail!"), TEXT("TEXT"), MB_OK);
}
hwnd = CreateWindow(szAppName,
TEXT("first window"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
500, 500,
NULL, NULL, hInstance, NULL);
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 HWND hwndButton[NUM];
static RECT rect;
/*static TCHAR szTop[] = TEXT("message wParam lParam"),
szUnd[] = TEXT("______ ______ ______"),
szFormat[] = TEXT("%-16s%04X-%04x %04X-%04X"),
szBuffer[50];*/
static int cxChar, cyChar;
HDC hdc;
PAINTSTRUCT ps;
int i;
switch (message)
{
case WM_CREATE:
cxChar = LOWORD(GetDialogBaseUnits());
cyChar = HIWORD(GetDialogBaseUnits());
for (i = 0; i < NUM; i++)
{
hwndButton[i] = CreateWindow(szAppNameButton,
button[i].szText,
WS_CHILD | WS_VISIBLE | button[i].iStyle,
2 * cxChar + 25, cyChar*(1 + 3 * i),
50 * cxChar, 7 * cyChar / 3,
hwnd,
(HMENU)i,
((LPCREATESTRUCT)lParam)->hInstance,
NULL);
}
return 0;
case WM_SIZE:
rect.left = 24 * cxChar;
rect.top = 2 * cyChar;
rect.right = LOWORD(lParam);
rect.bottom = HIWORD(lParam);
return 0;
case WM_PAINT:
InvalidateRect(hwnd, &rect, FALSE);
hdc = BeginPaint(hwnd, &ps);
SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
//SetBKMode(hdc, TRANSPARENT);
//TextOut(hdc, 24 * cxChar, cyChar, szTop, lstrlen(szTop));
//TextOut(hdc, 24 * cxChar, cyChar, szUnd, lstrlen(szUnd));
EndPaint(hwnd, &ps);
return 0;
//case WM_DRAWITEM:
case WM_COMMAND:
//ScrollWindow(hwnd, 0, -cyChar, &rect, &rect);
//hdc = GetDC(hwnd);
//SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
/*TextOut(hdc, 24 * cxChar,
cyChar*(rect.bottom / cyChar - 1),
szBuffer,
wsprintf(szBuffer, szFormat, message == WM_DRAWITEM ? TEXT("WM_DRAWITEM") : TEXT("WM_COMMAND"),
HIWORD(wParam),
LOWORD(wParam),
HIWORD(lParam),
LOWORD(lParam)));*/
//ReleaseDC(hwnd, hdc);
if (!RegisterClass(&wndchild))
{
MessageBox(NULL, TEXT("fail!"), TEXT("TEXT"), MB_OK);
}
HWND hwndchild;
hwndchild = CreateWindow(szAppNameChild,
TEXT("second window"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
200, 200,
NULL, (HMENU)1001, ((LPCREATESTRUCT)lParam)->hInstance, NULL);
ShowWindow(hwnd, SW_SHOWNORMAL);
UpdateWindow(hwndchild);
while (GetMessage(&msgchild, NULL, 0, 0))
{
TranslateMessage(&msgchild);
DispatchMessage(&msgchild);
}
ValidateRect(hwnd, &rect);
break;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
LRESULT CALLBACK WndProcChild(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
break;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
運行后五個按鈕，想單擊按鈕后顯示另一個視窗于是在wm_command訊息處理時呼叫createwindow()，但單擊按鈕后這個createwindow()函式報錯：記憶體訪問的問題，希望路過的朋友能指點一二。
uj5u.com熱心網友回復：
純API方式已經不推薦了，效率太低，了解一下原理就可以了，主要是訊息機制。圖形用戶界面（GUI）編程可以學習C++ Builder，架構先進，入門比較容易。
C++ Builder是真正的可視化的開發工具。C++ Builder可以用滑鼠拖拉控制元件加上設定屬性輕松的“設計”出一個程式的圖形用戶界面，利用可視的組件/控制元件像“搭積木”一樣，以“所見即所得”的方式搭建應用程式的界面，這也是C++ Builder這個名字中Builder的概念。這樣，只需要用C++語言撰寫業務邏輯代碼，類似于DOS下文本界面編程，只要專注于實作業務邏輯功能就可以了，代碼非常簡潔。資料的輸入和表現，都在圖形用戶界面，非常直觀、易用。這就是RAD開發（Rapid Application Development，快速應用程式開發）。
書籍推薦：
《C++Builder 6程式設計教程（第二版）》 （陸衛忠，劉文亮 等編著 /2011-04-01 /科學出版社）（當當網）
《C++Builder 6編程實體精解》（趙明現），PDF，是數字版的，非掃描版的，里面還有一個俄羅斯方塊游戲的完整實作。
《精彩C++Builder 6程式設計》（臺灣 吳逸賢），里面有10幾個簡單小游戲的實作，可以自己看懂以后再重寫，才是自己掌握的。
《C++ Builder 5高級編程實體精解》（劉濱 編著）都是較大的實用的程式。
C++ Builder書籍下載：
https://pan.baidu.com/s/13n9hxwVj9ai1p5L2rQC83Q
uj5u.com熱心網友回復：
貌似不是CreateWindow的問題，好像是訊息處理的問題。轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/37689.html
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