I have just learned C++ and I am trying to make a program using the windows.h header. I am using the Dev-C++ compiler and i am getting three errors that I can't find a solution to.
These are the errors:
cannot open output file filename.exe: Permission denied
[Error] ld returned 1 exit status recipe for target 'filename.exe' failed
Here is my code:
#include <windows.h&$62
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;
HWND textfield;
/* This is where all the input to the window goes to */
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
switch(Message) {
case WM_CREATE:
CreateWindow("STATIC",
"DocJoin Document Combiner",
WS_VISIBLE | WS_CHILD | WS_BORDER,
20,20,300,25,
hwnd,NULL,NULL,NULL);
break;
/* Upon destruction, tell the main thread to stop */
case WM_DESTROY: {
PostQuitMessage(0);
break;
}
/* All other messages (a lot of them) are processed using default procedures */
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}
/* The 'main' function of Win32 GUI programs: this is where execution starts */
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
WNDCLASSEX wc; /* A properties struct of our window */
HWND hwnd; /* A 'HANDLE', hence the H, or a pointer to our window */
MSG Msg; /* A temporary location for all messages */
/* zero out the struct and set the stuff we want to modify */
memset(&wc,0,sizeof(wc));
wc.cbSize = sizeof(WNDCLASSEX);
wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = "WindowClass";
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name "A" to use the project icon */
if(!RegisterClassEx(&wc)) {
MessageBox(NULL, "Window Registration Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,"WindowClass","DocJoin",WS_VISIBLE|WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, /* x */
CW_USEDEFAULT, /* y */
683, /* width */
730, /* height */
NULL,NULL,hInstance,NULL);
if(hwnd == NULL) {
MessageBox(NULL, "Window Creation Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
/*
This is the heart of our program where all input is processed and
sent to WndProc. Note that GetMessage blocks code flow until it receives something, so
this loop will not produce unreasonably high CPU usage
*/
while(GetMessage(&Msg, NULL, 0, 0) > 0) { /* If no error is received... */
TranslateMessage(&Msg); /* Translate key codes to chars if present */
DispatchMessage(&Msg); /* Send it to WndProc */
}
return Msg.wParam;
}
and here is the Makefile.win:
# Project: ProjectName
# Makefile created by Dev-C++ 5.6.3
CPP = g++.exe
CC = gcc.exe
WINDRES = windres.exe
OBJ = main.o
LINKOBJ = main.o
LIBS = -L"[...]" -L"[...]" -static-libgcc -mwindows -g3
INCS = -I"[...]" -I"[...]" -I"[...]"
CXXINCS = -I"[..]" -I"[...]" -I"[...]" -I"[...]"
BIN = filename.exe
CXXFLAGS = $(CXXINCS) -g3
CFLAGS = $(INCS) -g3
RM = rm.exe -f
.PHONY: all all-before all-after clean clean-custom
all: all-before $(BIN) all-after
clean: clean-custom
${RM} $(OBJ) $(BIN)
$(BIN): $(OBJ)
$(CPP) $(LINKOBJ) -o $(BIN) $(LIBS)
main.o: main.cpp
$(CPP) -c main.cpp -o main.o $(CXXFLAGS)
I spent 3 hours doing research and troubleshooting and I am just stumped. This is my first time using a C++ compiler, meaning that its my first program.
