CreateWindowsEx()失败，触发了断点

Question

从应用程序打开OpenGL窗口时遇到问题。

我使用的是一个64位控制台应用程序，我想从控制台中打开另一个窗口，供OpenGL绘制。

调用在CreateWindowEx()处失败，并以"MyApp.exe已触发断点"失败下面的代码初始化窗口本身。

bool OpenGL_Display::CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag, int posX, int posY)
{
GLuint      PixelFormat;            // Holds The Results After Searching For A Match
WNDCLASS    wc;                     // Windows Class Structure
DWORD       dwExStyle;              // Window Extended Style
DWORD       dwStyle;                // Window Style
RECT        WindowRect;             // Grabs Rectangle Upper Left / Lower Right Values
WindowRect.left=(long)0;            // Set Left Value To 0
WindowRect.right=(long)width;       // Set Right Value To Requested Width
WindowRect.top=(long)0;             // Set Top Value To 0
WindowRect.bottom=(long)height;     // Set Bottom Value To Requested Height
hInstance           = GetModuleHandle(NULL);                // Grab An Instance For Our Window
wc.style            = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;   // Redraw On Size, And Own DC For Window.
wc.lpfnWndProc      = NULL;                 // WndProc Handles Messages
wc.cbClsExtra       = 0;                                    // No Extra Window Data
wc.cbWndExtra       = 0;                                    // No Extra Window Data
wc.hInstance        = hInstance;                            // Set The Instance
wc.hIcon            = LoadIcon(NULL, IDI_WINLOGO);          // Load The Default Icon
wc.hCursor          = LoadCursor(NULL, IDC_ARROW);          // Load The Arrow Pointer
wc.hbrBackground    = NULL;                                 // No Background Required For GL
wc.lpszMenuName     = NULL;                                 // We Don't Want A Menu
wc.lpszClassName    = "OpenGL";                             // Set The Class Name
if (!RegisterClass(&wc))                                    // Attempt To Register The Window Class
{
MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE;                                           // Return FALSE
}
dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;           // Window Extended Style
dwStyle=WS_OVERLAPPEDWINDOW;                            // Windows Style
AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle);     // Adjust Window To True Requested Size
HWND hwndC = GetConsoleWindow();
// Create The Window
if (!(hWnd=CreateWindowEx(  dwExStyle,                          // Extended Style For The Window
"OpenGL",                           // Class Name
title,                              // Window Title
dwStyle |                           // Defined Window Style
WS_CLIPSIBLINGS |                   // Required Window Style
WS_CLIPCHILDREN,                    // Required Window Style
0, 0,                               // Window Position
WindowRect.right-WindowRect.left,   // Calculate Window Width
WindowRect.bottom-WindowRect.top,   // Calculate Window Height
hwndC,                              // No Parent Window
NULL,                               // No Menu
hInstance,                          // Instance
NULL)))                             // Dont Pass Anything To WM_CREATE
{
KillGLWindow();                             // Reset The Display
MessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE;                               // Return FALSE
}
}

导致它的前一个代码：

extern "C" __declspec(dllexport) void OpenGLDisplay_Init(int width, int height, int posX, int posY)
{
oglDisp.Init_Display(width, height, posX, posY);
}
void OpenGL_Display::Init_Display(int width, int height, int posX, int posY)
{
if (!CreateGLWindow("Ophthametrics Live Display", width, height, 24, false, posX, posY))
{
throw;
}   
}

里面出了什么问题？我不知道，我正在使用我用于另一个应用程序的代码，它运行得很好。尽管它在这里失败得很厉害(在最初的代码中，它不是控制台应用程序，而是一个没有控制台的Win32应用程序)。

最终的解决方案是在一个被调用的DLL中，一旦被调用，它应该创建一个窗口供OpenGL绘制。

Answer 1

"如果你把你的窗口进程指向一个真正的函数会怎样？">

斯拉戈写的，就这样。