MFC VM_CREATE消息为啥触发不了。,综合交流区,技术交流,鱼C论坛

leewon 发表于 2013-9-26 21:28:52

MFC VM_CREATE消息为啥触发不了。

#include "Header.h"
#include <conio.h>
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
wincl.hInstance = hInstance;
wincl.lpszClassName = TEXT("szClassName");
wincl.lpfnWndProc = WinProc;
wincl.style = 0;
wincl.cbSize = sizeof (WNDCLASSEX);
wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl.lpszMenuName = NULL;
wincl.cbClsExtra = 0;
wincl.cbWndExtra = 0;
wincl.hbrBackground = CreateSolidBrush(RGB(255, 240, 240));
wincl.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(thisicon));
wincl.hIconSm = LoadIcon(hInstance, MAKEINTRESOURCE(thisicon));
RegisterClassEx(&wincl);
hwnd = CreateWindowEx(WS_EX_ACCEPTFILES, TEXT("szClassName"), TEXT("Abandoned on a Moonlit Night"), WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_SIZEBOX, CW_USEDEFAULT, CW_USEDEFAULT, 534, 311, HWND_DESKTOP, NULL, hInstance, NULL);
ShowWindow(hwnd, nCmdShow);
while (GetMessage(&messages, NULL, 0, 0))
{
               /*此处代码为本人加上去的，本意是想看下getmesage在消息队列获取消息后的消息参数情况
               * 加了这段代码后，发现不能执行到WinProc的VM_CREATE里面的代码，只有主窗口
               */
FILE *stream;
AllocConsole();
freopen_s(&stream, "CONOUT$", "w", stdout);
printf("hWnd:%d uMsg: %d WParam: %dLParam: %d\n",messages.hwnd, messages.message, messages.wParam, messages.lParam);
//getchar();
FreeConsole();
TranslateMessage(&messages);
DispatchMessage(&messages);
}
return 0;
}
LRESULT CALLBACK WinProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_CREATE: //This runs when the window is created
{
HWND textBox1 = CreateWindow(TEXT("edit"), TEXT(""), WS_VISIBLE | WS_CHILD | WS_BORDER, 36, 10, 100, 20, hwnd, (HMENU)1, NULL, NULL); //This creates textbox
HWND textbox2 = CreateWindow(TEXT("edit"), TEXT(""), WS_VISIBLE | WS_CHILD | WS_BORDER, 36, 28, 100, 20, hwnd, (HMENU)2, NULL, NULL);
HWND label1 = CreateWindow(TEXT("static"), TEXT("X"), WS_VISIBLE | WS_CHILD | WS_TABSTOP, 12, 13, 14, 13, hwnd, (HMENU)14, NULL, NULL); //This creates a label
HWND label2 = CreateWindow(TEXT("static"), TEXT("Y"), WS_VISIBLE | WS_CHILD | WS_TABSTOP, 12, 28, 14, 13, hwnd, (HMENU)15, NULL, NULL);
HWND radioButton1 = CreateWindow(TEXT("BUTTON"), TEXT("Add"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP , 15, 72, 44, 17, hwnd, (HMENU)3, NULL, NULL); //This creates the first radiobutton in the group
HWND radioButton2 = CreateWindow(TEXT("BUTTON"), TEXT("Sub"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 15, 96, 44, 17, hwnd, (HMENU)4, NULL, NULL);
HWND radioButton3 = CreateWindow(TEXT("BUTTON"), TEXT("Div"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 15, 144, 44, 17, hwnd, (HMENU)5, NULL, NULL);
HWND radioButton4 = CreateWindow(TEXT("BUTTON"), TEXT("Mul"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 15, 120, 44, 17, hwnd, (HMENU)6, NULL, NULL);
HWND radioButton5 = CreateWindow(TEXT("BUTTON"), TEXT("Equal"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP , 271, 48, 160, 17, hwnd, (HMENU)7, NULL, NULL); //This creates the first radiobutton in the second group
HWND radioButton6 = CreateWindow(TEXT("BUTTON"), TEXT("Greater Than"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 271, 72, 160, 17, hwnd, (HMENU)8, NULL, NULL);
HWND radioButton7 = CreateWindow(TEXT("BUTTON"), TEXT("Less Than"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 271, 96, 160, 17, hwnd, (HMENU)9, NULL, NULL);
HWND radioButton8 = CreateWindow(TEXT("BUTTON"), TEXT("Greater Than or Equal"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 271, 120, 160, 17, hwnd, (HMENU)10, NULL, NULL);
HWND radioButton9 = CreateWindow(TEXT("BUTTON"), TEXT("Less Than or Equal"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 271, 144, 160, 17, hwnd, (HMENU)11, NULL, NULL);
HWND radioButton10 = CreateWindow(TEXT("BUTTON"), TEXT("Not Equal"), WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON, 271, 168, 160, 17, hwnd, (HMENU)12, NULL, NULL);
HWND label3 = CreateWindow(TEXT("static"), TEXT("Answer"), WS_VISIBLE | WS_CHILD | WS_GROUP | WS_TABSTOP, 33, 53, 160, 13, hwnd, (HMENU)13, NULL, NULL);
UpdateWindow(hwnd);
break;
}
case WM_COMMAND:
{
switch (wParam)
{
case 3: //This is ran when the radiobutton with (HEMNU)3 is pressed
{
std::ostringstream ostr;
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
random = x_number + y_number;
ostr << random;
random_string = ostr.str();
SetDlgItemText(hwnd, 13, random_string.c_str());
break;
}
case 4:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
std::ostringstream ostr;
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
random = x_number - y_number;
ostr << random;
random_string = ostr.str();
SetDlgItemText(hwnd, 13, random_string.c_str());
break;
}
case 5:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
std::ostringstream ostr;
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
random = x_number / y_number;
ostr << random;
random_string = ostr.str();
SetDlgItemText(hwnd, 13, random_string.c_str());
break;
}
case 6:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
std::ostringstream ostr;
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
random = x_number * y_number;
ostr << random;
random_string = ostr.str();
SetDlgItemText(hwnd, 13, random_string.c_str());
break;
}
case 7:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
if (x_number == y_number)
{
whattodisplay = 1;
}
else
{
whattodisplay = 2;
}
RECT rect = {0, 0, 534, 311};
InvalidateRect(hwnd, &rect, TRUE);
break;
}
case 8:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
if (x_number > y_number)
{
whattodisplay = 1;
}
else
{
whattodisplay = 2;
}
RECT rect = {0, 0, 534, 311};
InvalidateRect(hwnd, &rect, TRUE);
break;
}
case 9:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atoi(x); //This converts the string x to a integer then stores it in x_number
y_number = atoi(y);
if (x_number < y_number)
{
whattodisplay = 1;
}
else
{
whattodisplay = 2;
}
RECT rect = {0, 0, 534, 311};
InvalidateRect(hwnd, &rect, TRUE);
break;
}
case 10:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
if (x_number >= y_number)
{
whattodisplay = 1;
}
else
{
whattodisplay = 2;
}
RECT rect = {0, 0, 534, 311};
InvalidateRect(hwnd, &rect, TRUE);
break;
}
case 11:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
if (x_number <= y_number)
{
whattodisplay = 1;
}
else
{
whattodisplay = 2;
}
RECT rect = {0, 0, 534, 311};
InvalidateRect(hwnd, &rect, TRUE);
break;
}
case 12:
{
GetDlgItemText(hwnd, 1, x, 32767);
GetDlgItemText(hwnd, 2, y, 32767);
if (x == "") //This sees if x has no value
         {
         x = '0'; //This sets x to 0
}
            if (y == "") //This sees if x has no value
         {
         y = '0'; //This sets y to 0
            }
x_number = atof(x); //This converts the string x to a integer then stores it in x_number
y_number = atof(y);
if (x_number != y_number)
{
whattodisplay = 1;
}
else
{
whattodisplay = 2;
}
RECT rect = {0, 0, 534, 311};
InvalidateRect(hwnd, &rect, TRUE);
break;
}
}
}
case WM_PAINT: //This runs when the window is requested to repaint itself
{
BITMAP bm;
PAINTSTRUCT ps;
HDC screendc = BeginPaint(hwnd, &ps);
HDC bitmaphdc = CreateCompatibleDC(screendc);
HGDIOBJ orginal = SelectObject(bitmaphdc, LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(file))); //It is important to save the result of the first SelectObject, and put it back into the HDC before you delete the HDC
if (whattodisplay == 0)
{
BitBlt(screendc, 271, 10, 90, 35, bitmaphdc, 0, 0, SRCCOPY);
}
else
{
if (whattodisplay == 1)
{
SelectObject(bitmaphdc, LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(yes)));
BitBlt(screendc, 271, 10, 90, 35, bitmaphdc, 0, 0, SRCCOPY);
}
else
{
SelectObject(bitmaphdc, LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(no)));
BitBlt(screendc, 271, 10, 90, 35, bitmaphdc, 0, 0, SRCCOPY);
}
}
SelectObject(bitmaphdc, orginal);
DeleteDC(bitmaphdc);
EndPaint(hwnd, &ps);
break;
}
case WM_DESTROY: //This runs when the window is destroyed
{
exit(0);
break;
}
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
}

玉宁417 发表于 2013-9-27 07:40:44

新人，路过学习一下{:1_1:}

小号4 发表于 2013-9-28 21:30:40

不太懂，不过你可以调试一下哪里出问题了

elong130 发表于 2013-9-29 16:16:17

可以执行到，你在WM_CREATE的第一行加上MESSAGEBOX(NULL,NULL,NULL,NULL)，运行后会弹出一个对话框，我自己按照你加的代码试过，可以执行，不过窗口会不停的闪烁+移动。你可以看看WM_CREATE里的设置是否生效，但是该消息一定执行到了。

指尖发表于 2013-9-30 15:09:28

本帖最后由指尖于 2013-9-30 15:10 编辑

执行到这个地方是一定的，但没按你的想法来做，，，哈哈，你最好看一下清华的李力祥的视频，自己得来的答案比较深刻，，你的问题在于没搞懂消息机制。。。。。如果您看视频解决了问题，别忘了给我发钱，哥需要鱼币下载OD的试验程序和ppt{:5_102:} ，，，最后别找我要视频地址，还是您自己找，，，，

页: [1]

鱼C论坛's Archiver

MFC VM_CREATE消息为啥触发不了。